By anonymous grey on Jun 01, 2021 03:59 am
Am Not able to find /opt /var /tmp in lsblk RHEL 8.1.Can you please help me. [xxx@exxx ~]$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 64G 0 disk +-sda1 8:1 0 500M 0 part /boot/efi +-sda2 8:2 0 500M 0 part /boot +-sda3 8:3 0 2M 0 part +-sda4 8:4 0 60G 0 part +-rootvg-rootlv 253:5 0 60G 0 lvm /
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By Akshdeep Singh on Jun 01, 2021 03:59 am
I am streaming video on web using flask, by following this blog. I also want to send a string with every frame to display a message below the video. How to do that? def gen(camera): while True: frame = camera.get_frame() # here i want a new string to send along with each frame yield (b'--frame\r\n' b'Content-Type: image/jpeg\r\n\r\n' + frame + b'\r\n')
<html> <head> <title>Video Streaming Demonstration</title> </head> <body> <h1>Video Streaming Demonstration</h1> <img src="{{ url_for('video_feed') }}"> <p><!-- string to be shown here --></p> </body> </html>
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By chaitanya gupta on Jun 01, 2021 03:59 am
i have a a string array which contains two integer array ["[1,2,3]","[4,5,6,7,8]"] I want to add the elements of integer array for example - 1+4,2+5,3+6 and store and print the result in a single integer array - [4,7,9,7,8] What is the efficient approach to solving this problem?
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By alexandre on Jun 01, 2021 03:58 am
I'm trying to scrap datas on a website, searching by a reference or by a name of a product, but I only get the first link of the page. I think the page doesn't wait for navigation and it's for that reason I can't get the result of my search. Here is my code. The keyword ref has to be replaced by a word because on my code, i get this result on typing on a search bar. If anyone could help me, I would be very grateful. Thank you in advance const ObjectsToCsv = require('objects-to-csv'); const scraperObject = { url: 'await page.goto('https://polspotten.nl/products/all');', async scraper(browser, ref) { let page = await browser.newPage(); console.log(`Navigating to ${this.url}...`); // Navigate to the selected page await page.goto(this.url); // Wait for the required DOM to be rendered async function scrapeCurrentPage(ref){ await page.type('input[name="search"]', ref); page.waitForNavigation(); await Promise.all([ page.$eval('.products-content a', el => el.click()), page.waitForNavigation({waitUntil: 'load'}) ]); let dataObj = {}; dataObj['nom_du_produit'] = await page.$eval('.product-info-panel > div > div > h1', text => text.textContent.replace(/(\r\n\t|\n|\r|\t)/gm, "")); dataObj['prix avant promo'] = await page.$eval('.product-info-panel > div > div >.prices > p:nth-child(1)', text => text.textContent.replace(/(\r\n\t|\n|\r|\t)/gm, "")); dataObj['prix après promo'] = await page.$eval('.product-info-panel > div > div >.prices > p:nth-child(2)', text => text.textContent.replace(/(\r\n\t|\n|\r|\t)/gm, "")); dataObj['référence'] = await page.$eval('.product-info-panel > div > p', text => text.textContent.replace(/(\r\n\t|\n|\r|\t)/gm, "")); console.log(dataObj); // await browser.close(); // csv file let data = [dataObj]; (async () => { const csv = new ObjectsToCsv(data); // Save to file: await csv.toDisk('./products.csv', { append: true }); // Return the CSV file as string: console.log(await csv.toString()); })(); } await scrapeCurrentPage(ref); } } module.exports = scraperObject;
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By Sun on Jun 01, 2021 03:58 am
p = 40193, q = 157, g = 131, x = 89, H(m) = 241, k = 127 r = (131^127 mod 40193) mod 157, r = 59 s = k^-1 * (241 + 59 * 89) mod 157, 68 k^-1 * (241 + 59 * 89) mod 157 = 110, s = 110 y = 131^89 mod 40193 = 39368 w = 110^-1 mod 157 = 10 a = 10 * 241 mod 157 = 55 b = 10 * 59 mod 157 = 119 v = ((131^55 * 39368^119) mod 40193) mod 157 = ((8396 * 32204) mod 40193) mod 157 = 6473 mod 157 = 36 v != r
Please give me some advice. I don't know what's wrong.
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By akshay acharya on Jun 01, 2021 03:58 am
I am running a basic maskr cnn program to detect objects. It is using the coco datatset. I am running this on Jupyter notebook connected to my AWS Ec2 instance. I getting the following error Below is the traceback from this internal error. Traceback (most recent call last): File "/usr/local/lib/python3.6/dist-packages/IPython/core/interactiveshell.py", line 3343, in run_code exec(code_obj, self.user_global_ns, self.user_ns) File "<ipython-input-1-dfbb133297e0>", line 117, in <module> cv2.imshow('frame', frame) cv2.error: OpenCV(4.2.0) /home/ubuntu/src/opencv/modules/highgui/src/window.cpp:651: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function 'cvShowImage' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/local/lib/python3.6/dist-packages/IPython/core/interactiveshell.py", line 2044, in showtraceback stb = value._render_traceback_() AttributeError: 'error' object has no attribute '_render_traceback_' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/local/lib/python3.6/dist-packages/IPython/core/ultratb.py", line 1169, in get_records return _fixed_getinnerframes(etb, number_of_lines_of_context, tb_offset) File "/usr/local/lib/python3.6/dist-packages/IPython/core/ultratb.py", line 316, in wrapped return f(*args, **kwargs) File "/usr/local/lib/python3.6/dist-packages/IPython/core/ultratb.py", line 350, in _fixed_getinnerframes records = fix_frame_records_filenames(inspect.getinnerframes(etb, context)) File "/usr/lib/python3.6/inspect.py", line 1490, in getinnerframes frameinfo = (tb.tb_frame,) + getframeinfo(tb, context) File "/usr/lib/python3.6/inspect.py", line 1448, in getframeinfo filename = getsourcefile(frame) or getfile(frame) File "/usr/lib/python3.6/inspect.py", line 696, in getsourcefile if getattr(getmodule(object, filename), '__loader__', None) is not None: File "/usr/lib/python3.6/inspect.py", line 733, in getmodule if ismodule(module) and hasattr(module, '__file__'): File "/usr/local/lib/python3.6/dist-packages/tensorflow/__init__.py", line 50, in __getattr__ module = self._load() File "/usr/local/lib/python3.6/dist-packages/tensorflow/__init__.py", line 44, in _load module = _importlib.import_module(self.__name__) File "/usr/lib/python3.6/importlib/__init__.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "<frozen importlib._bootstrap>", line 994, in _gcd_import File "<frozen importlib._bootstrap>", line 971, in _find_and_load File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 665, in _load_unlocked File "<frozen importlib._bootstrap_external>", line 678, in exec_module File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed File "/usr/local/lib/python3.6/dist-packages/tensorflow_core/contrib/__init__.py", line 48, in <module> from tensorflow.contrib import estimator File "/usr/local/lib/python3.6/dist-packages/tensorflow_core/contrib/estimator/__init__.py", line 30, in <module> from tensorflow_estimator.contrib import estimator ModuleNotFoundError: No module named 'tensorflow_estimator.contrib' --------------------------------------------------------------------------- error Traceback (most recent call last) [... skipping hidden 1 frame] <ipython-input-1-dfbb133297e0> in <module> 116 --> 117 cv2.imshow('frame', frame) 118 cv2.waitkey(0) error: OpenCV(4.2.0) /home/ubuntu/src/opencv/modules/highgui/src/window.cpp:651: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function 'cvShowImage' During handling of the above exception, another exception occurred: AttributeError Traceback (most recent call last) /usr/local/lib/python3.6/dist-packages/IPython/core/interactiveshell.py in showtraceback(self, exc_tuple, filename, tb_offset, exception_only, running_compiled_code) 2043 # in the engines. This should return a list of strings. -> 2044 stb = value._render_traceback_() 2045 except Exception: AttributeError: 'error' object has no attribute '_render_traceback_' During handling of the above exception, another exception occurred: TypeError Traceback (most recent call last) [... skipping hidden 1 frame] /usr/local/lib/python3.6/dist-packages/IPython/core/interactiveshell.py in showtraceback(self, exc_tuple, filename, tb_offset, exception_only, running_compiled_code) 2045 except Exception: 2046 stb = self.InteractiveTB.structured_traceback(etype, -> 2047 value, tb, tb_offset=tb_offset) 2048 2049 self._showtraceback(etype, value, stb) /usr/local/lib/python3.6/dist-packages/IPython/core/ultratb.py in structured_traceback(self, etype, value, tb, tb_offset, number_of_lines_of_context) 1434 self.tb = tb 1435 return FormattedTB.structured_traceback( -> 1436 self, etype, value, tb, tb_offset, number_of_lines_of_context) 1437 1438 /usr/local/lib/python3.6/dist-packages/IPython/core/ultratb.py in structured_traceback(self, etype, value, tb, tb_offset, number_of_lines_of_context) 1334 # Verbose modes need a full traceback 1335 return VerboseTB.structured_traceback( -> 1336 self, etype, value, tb, tb_offset, number_of_lines_of_context 1337 ) 1338 elif mode == 'Minimal': /usr/local/lib/python3.6/dist-packages/IPython/core/ultratb.py in structured_traceback(self, etype, evalue, etb, tb_offset, number_of_lines_of_context) 1191 1192 formatted_exception = self.format_exception_as_a_whole(etype, evalue, etb, number_of_lines_of_context, -> 1193 tb_offset) 1194 1195 colors = self.Colors # just a shorthand + quicker name lookup /usr/local/lib/python3.6/dist-packages/IPython/core/ultratb.py in format_exception_as_a_whole(self, etype, evalue, etb, number_of_lines_of_context, tb_offset) 1148 1149 -> 1150 last_unique, recursion_repeat = find_recursion(orig_etype, evalue, records) 1151 1152 frames = self.format_records(records, last_unique, recursion_repeat) /usr/local/lib/python3.6/dist-packages/IPython/core/ultratb.py in find_recursion(etype, value, records) 449 # first frame (from in to out) that looks different. 450 if not is_recursion_error(etype, value, records): --> 451 return len(records), 0 452 453 # Select filename, lineno, func_name to track frames with TypeError: object of type 'NoneType' has no len()
This is my code. I have taken it from a basic tutorial that I found online to create a simple mask on an image based on Matterport's MRCNN model. import numpy as np import tensorflow print(tensorflow.__version__) def random_colors(N): np.random.seed(1) colors = [tuple(255 * np.random.rand(3)) for _ in range(N)] return colors def apply_mask(image, mask, color, alpha=0.5): """apply mask to image""" for n, c in enumerate(color): image[:, :, n] = np.where( mask == 1, image[:, :, n] * (1 - alpha) + alpha * c, image[:, :, n] ) return image def display_instances(image, boxes, masks, ids, names, scores): """ take the image and results and apply the mask, box, and Label """ n_instances = boxes.shape[0] colors = random_colors(n_instances) if not n_instances: print('NO INSTANCES TO DISPLAY') else: assert boxes.shape[0] == masks.shape[-1] == ids.shape[0] for i, color in enumerate(colors): if not np.any(boxes[i]): continue y1, x1, y2, x2 = boxes[i] label = names[ids] score = scores[i] if scores is not None else None caption = '{} {:.2f}'.format(label, score) if score else label mask = masks[:, :, i] image = apply_mask(image, mask, color) image = cv2.rectangle(image, (x1, y1), (x2, y2), color, 2) image = cv2.putText( image, caption, (x1, y1), cv2.FONT_HERSHEY_COMPLEX, 0.7, color, 2 ) return image if __name__ == '__main__': """ test everything """ import os import sys from mrcnn import utils from mrcnn import model as modellib ROOT_DIR = os.getcwd() MODEL_DIR = os.path.join(ROOT_DIR, "logs") COCO_MODEL_PATH = os.path.join(ROOT_DIR, "mask_rcnn_coco.h5") if not os.path.exists(COCO_MODEL_PATH): utils.download_trained_weights(COCO_MODEL_PATH) sys.path.append(os.path.join(ROOT_DIR, "samples/coco/")) # To find local version import coco class InferenceConfig(coco.CocoConfig): GPU_COUNT = 1 IMAGES_PER_GPU = 1 config = InferenceConfig() config.display() model = modellib.MaskRCNN( mode="inference", model_dir=MODEL_DIR, config=config ) model.load_weights(COCO_MODEL_PATH, by_name=True) class_names = [ 'BG', 'person', 'bicycle', 'car', 'motorcycle', 'airplane', 'bus', 'train', 'truck', 'boat', 'traffic light', 'fire hydrant', 'stop sign', 'parking meter', 'bench', 'bird', 'cat', 'dog', 'horse', 'sheep', 'cow', 'elephant', 'bear', 'zebra', 'giraffe', 'backpack', 'umbrella', 'handbag', 'tie', 'suitcase', 'frisbee', 'skis', 'snowboard', 'sports ball', 'kite', 'baseball bat', 'baseball glove', 'skateboard', 'surfboard', 'tennis racket', 'bottle', 'wine glass', 'cup', 'fork', 'knife', 'spoon', 'bowl', 'banana', 'apple', 'sandwich', 'orange', 'broccoli', 'carrot', 'hot dog', 'pizza', 'donut', 'cake', 'chair', 'couch', 'potted plant', 'bed', 'dining table', 'toilet', 'tv', 'laptop', 'mouse', 'remote', 'keyboard', 'cell phone', 'microwave', 'oven', 'toaster', 'sink', 'refrigerator', 'book', 'clock', 'vase', 'scissors', 'teddy bear', 'hair drier', 'toothbrush' ] #capture = cv2.VideoCapture(0) # these 2 lines can be removed if you dont have a 1080p camera. ##capture.set(cv2.CAP_PROP_FRAME_WIDTH, 1920) #capture.set(cv2.CAP_PROP_FRAME_HEIGHT, 1080) #while True: frame = cv2.imread("test_images.jpg") results = model.detect([frame], verbose=0) r = results[0] frame = display_instances( frame, r['rois'], r['masks'], r['class_ids'], class_names, r['scores'] ) cv2.imshow('frame', frame) cv2.waitkey(0) #if cv2.waitKey(1) & 0xFF == ord('q'): # break #capture.release() cv2.destroyAllWindows()
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By JohnBigs on Jun 01, 2021 03:58 am
solving something in algoexpert and getting weird index out of bound exception: the question is simply to take an array and another int and put all the numbers that equal to this int in the end of the array, like this: array: [2, 1, 2, 2, 2, 3, 4, 2] integer toMove: 2 output: [1,3,4,2,2,2,2,2] so I wrote this algorithm: class Program { public static List<Integer> moveElementToEnd(List<Integer> array, int toMove) { // Write your code here. int newArr = new int[array.size()]; int lastIndertedNotToMoveIdx = 0; int endOfArrayIdx = array.size(); // ArrayList<Integer> list = new ArrayList<Integer>(); for (int i = 0; i <= array.size(); i++) { if (array.get(i) == toMove) { newArr[endOfArrayIdx] = array.get(i); endOfArrayIdx = endOfArrayIdx-1; } else { newArr[lastIndertedNotToMoveIdx] = array.get(i); lastIndertedNotToMoveIdx++; } } List<Integer> ret_list = new ArrayList<Integer>(); for(Integer num:newArr) { ret_list.add(num); } return ret_list; } }
but here newArr[endOfArrayIdx] = array.get(i); I get this message: at Program.moveElementToEnd(Program.java:12) at AeJsonTest.getActual(AeJsonTest.java:27) at Main.main(Main.java:57)``` not sure why...
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By Myat Po Po Aung on Jun 01, 2021 03:58 am
I want to print report voucher exactly one page. Although my first page left space, my voucher divide two page
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By TsioryHL on Jun 01, 2021 03:58 am
[console][1] this image contains the console error...my declaration of charts.init() and charts.CreateCompletedJobChart() is indefined [code][2] [1]: https://i.stack.imgur.com/n2Ied.png [2]: https://i.stack.imgur.com/g0a4C.png
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By M4RC0Sx on Jun 01, 2021 03:47 am
I've seen that on Pandas version 1.3.0.dev0+1779.gdcc2a8f801 there is a new implemented method (read_xml) and I would like to use it. The problem is that I have not found a way to install a development version of Pandas. i am currently using Python3 and pip and have tried from its source repository (Pandas-dev page) How could I deal with that? Maybe using Conda or compiling it myself? I don't know exactcly how to do it...
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By Ahmed Tarek on Jun 01, 2021 03:45 am
I want to send the path to a bash script which sources some environmental variables as an argument to another bash script to run it and use the environmental variables. It works well with no arguments if I hard coded the path to the bash script to run it works and I can retrieve the environmental variables in the main script. the problem happens when I send the path as an argument it does not want to run it. for example if the path is /path/script.bash and I send the path as an argument I get the error that /path/env_set: No such a file or directory I run the script by this line . $1 (this doesn't work) . /path/script.bash (this works)
I don't know why env_set replaces the script name when I use arguments. Is there any approach to achieve this or any work around to achieve my goal?
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By Sougata Ghosh on Jun 01, 2021 03:42 am
I'm loading a react app that has a root component App.js which is determining if an authenticated user exists through a central redux store, but the problem is it takes a fraction of a second to resolve. Until then the user is getting a flash of the login page even if the user is logged in, which I'm sure counts as bad user experience. Is there a way to not show anything at all until the the status is resolved. I'm attaching a code snippet. function App(props) { const cookies = new Cookies(); const { user } = props; if (cookies.get("authToken") === "null" || cookies.get("authToken") === undefined) { //console.log("no valid token"); } else { if (user === null) { props.fetchLoggedInUser(cookies.get("authToken")); } } const isLoggedIn = user ? ( <div className="App s12 l12 m12"> <Navbar user={user}/> <Switch> <Route exact path="/" component={() => (<Home user={user} />)}></Route> <Route exact path="/create_blog" component={() => (<CreateBlog user={user} />)}></Route> <Route exact path="/edit_profile" component={() => (<EditProfile user={user} />)}></Route> </Switch> </div> ) : ( <div className="App"> <Navbar user={null}/> <Switch> <Route exact path="/" component={() => (<Home user={null} />)}></Route> <Route exact path="/log_in" component={LogIn}></Route> <Route exact path="/sign_up" component={SignUp}></Route> </Switch> </div> ); return ( <BrowserRouter> {isLoggedIn} </BrowserRouter> ); } const mapStateToProps = (state) => { return { authError: state.auth.authError, token: state.auth.token, user: state.auth.user } } const mapDispatchToProps = (dispatch) => { return { fetchLoggedInUser: (token) => dispatch(fetchLoggedInUser(token)) } } export default connect(mapStateToProps, mapDispatchToProps)(App);
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By wjack_backsstreeu on Jun 01, 2021 03:39 am
The following statements will be executed. select current_timestamp + dbms_random.value(40, 59) minute from dual;
The statement I want doesn't work. to_date('2021-01-05:08:50:00', 'yyyy-mm-dd:hh24:mi:ss') + dbms_random.value(40, 59) minute;
I am getting the error <analytic clause>, '@', KEEP or WITHIN expected, got 'minute' and I am wondering how to solve this.
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By amberlex78 on Jun 01, 2021 03:36 am
How to generate "make:model -a" with directory for seeders and controller and migrate name? Laravel Framework 8.44.0 I am generating a model php artisan make:model Blog/MyCategory -a and expect to see the following structure: Controllers/Blog/MyCategoryController.php Models/Blog/MyCategory.php factories/Blog/MyCategory.php mifrations/2021_06_01_042639_create_blog_my_categories_table.php seeders/Blog/MyCategorySeeder.php
Execute the command php artisan make:model Blog/Category -a Model created successfully. Factory created successfully. Created Migration: 2021_06_01_044253_create_my_categories_table Seeder created successfully. Controller created successfully.
but it creates Controllers/MyCategoryController.php (NO) Models/Blog/MyCategory.php (YES) factories/Blog/MyCategory.php (YES) mifrations/2021_06_01_042639_create_my_categories_table.php (NO) seeders/MyCategorySeeder.php (NO)
This way I cannot generate two MyCategory. Execute the command php artisan make:model Shop/MyCategory -a Model created successfully. Factory created successfully. InvalidArgumentException A CreateMyCategoriesTable class already exists. at vendor/laravel/framework/src/Illuminate/Database/Migrations/MigrationCreator.php:102
Remove the - model
Shop/MyCategory.php, - factory
Shop/MyCategoryFactory.php - migration file
2021_06_01_044253_create_my_categories_table.php Now let's create the correct migration file php artisan make:migration CreateBlogMyCategoryTable Again execute the command php artisan make:model Shop/MyCategory -a Model created successfully. Factory created successfully. Created Migration: 2021_06_01_050039_create_my_categories_table Seeder already exists! Controller already exists!
It again creates a 2021_06_01_050039_create_my_categories_table file and does not take into account the model in the Shop directory Remove generated files again: - model
Shop/MyCategory.php - factory
Shop/MyCategoryFactory.php - migration file
2021_06_01_050039_create_my_categories_table.php - controller
MyCategoryController.php Now let's create the correct migration and controllers: php artisan make:migration CreateShopMyCategoryTablephp artisan make:controller Blog/MyCategoryControllerphp artisan make:controller Shop/MyCategoryController Total Thus, we see that the "-а" option is not suitable in this case. You need to create models, controllers and migrations separately. php artisan make:controller Blog/MyCategoryController -r php artisan make:controller Shop/MyCategoryController -r php artisan make:migration CreateBlogMyCategoryTable php artisan make:migration CreateShopMyCategoryTable
Model with factory php artisan make:model Blog/MyCategory -f php artisan make:model Shop/MyCategory -f
This command also makes the correct Factory php artisan make:factory Blog\\MyCategoryFactory --model=Blog\\MyCategory
<?php namespace Database\Factories\Blog; use App\Models\Blog\MyCategory; use Illuminate\Database\Eloquent\Factories\Factory; class MyCategoryFactory extends Factory { /** * The name of the factory's corresponding model. * * @var string */ protected $model = MyCategory::class; // .... }
The migration files, models, and controllers as we need in the appropriate directories. php artisan migrate Migration table created successfully. ... Migrating: 2021_06_01_055036_create_blog_my_category_table Migrated: 2021_06_01_055036_create_blog_my_category_table (36.26ms) Migrating: 2021_06_01_055541_create_shop_my_category_table Migrated: 2021_06_01_055541_create_shop_my_category_table (39.16ms)
As I understand it, the required structure will still have to be done by separate commands. But then another problem appeared: I do not understand how to use now factory()->create() Route::get('/', function () { \App\Models\Blog\MyCategory::factory(1)->create(); return view('welcome'); });
Illuminate\Database\QueryException SQLSTATE[42S02]: Base table or view not found: 1146 Table 'larablog.my_categories' doesn't exist (SQL: insert into `my_categories` (`updated_at`, `created_at`) values (2021-06-01 06:59:52, 2021-06-01 06:59:52))
or tinker php artisan tinker Psy Shell v0.10.8 (PHP 7.4.18 — cli) by Justin Hileman >>> MyCategory::factory()->create() PHP Error: Class 'MyCategory' not found in Psy Shell code on line 1 >>> Blog\MyCategory::factory()->create() PHP Error: Class 'Blog\MyCategory' not found in Psy Shell code on line 1 >>> \Blog\MyCategory::factory()->create() PHP Error: Class 'Blog\MyCategory' not found in Psy Shell code on line 1 >>> App\Models\Blog\MyCategory::factory()->create() Illuminate\Database\QueryException with message 'SQLSTATE[42S02]: Base table or view not found: 1146 Table 'larablog.my_categories' doesn't exist (SQL: insert into `my_categories` (`updated_at`, `created_at`) values (2021-06-01 06:48:26, 2021-06-01 06:48:26))' >>> \App\Models\Blog\MyCategory::factory()->create() Illuminate\Database\QueryException with message 'SQLSTATE[42S02]: Base table or view not found: 1146 Table 'larablog.my_categories' doesn't exist (SQL: insert into `my_categories` (`updated_at`, `created_at`) values (2021-06-01 06:48:29, 2021-06-01 06:48:29))'
How to make such a structure work?
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By kilianc on Jun 01, 2021 03:26 am
Given message.text: string | undefined I check for nil and go on with my code assuming that TS inferred the new type to string. You can see that it does when I do const text = message.text. The type check fails when I call regExp.test(message.text) and I can't explain why. This function is sync, mutability is not possible. What am I missing? You can fiddle around the TS playground I created type Message = { text?: string } const urlIgnoreList = [ /a/, /b/, /c/ ] const shouldProcessMessage = (message: Message) => { if (message.text == null) { return false } if (message.text.startsWith(`!`)) { return false } // why does this type check fail? if (urlIgnoreList.some((regExp) => regExp.test(message.text))) { return false } // this is fine as I expected const text = message.text if (urlIgnoreList.some((regExp) => regExp.test(text))) { return false } return true }
TS Error on line 19: Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.ts(2345)
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By nilufer17 on Jun 01, 2021 03:23 am
I want to reach out SpeechRegions' datas in Channel. When i write "console.log(speech.Channels)", i can see this json data below. But when i write "console.log(speech.Channels.SpeechRegions)", it gives me undefined. Can you explain to me its reason? Channels: [ { SilenceRegions: , SpeechRegions: [Array], SilenceDuration: 0, SpeechDuration: 8.68, SilenceRatio: 0, SpeechRatio: 1, InterruptCount: 0, Channel: 0 } ],
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By O. Mohsen on Jun 01, 2021 03:18 am
I believe this is an easy problem to solve. I have searched and found a few similar answers but not an efficient way to exactly what I want to achieve. Assuming the following list: x = [6, 7, 8]
I want to create a new list by repeating each number k times. Assuming k=3, the result should be: xr = [6, 6, 6, 7, 7, 7, 8, 8, 8]
I was able to accomplish this using nest loops, which I believe is very inefficient: xr = for num in x: # for each number in the list for t in range(3): # repeat 3 times xx2.append(num)
I also tried: [list(itertools.repeat(x, 3)) for i in range(len(x))]
but I get: [[6, 6, 6], [7, 7, 7], [8, 8, 8]]
Is there a more efficient direct method to accomplish this?
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By Mohammad Iraqi on Jun 01, 2021 03:12 am
I need to count grades greater than the class Average based in the following terms: - arrays cant be used to solve this question
- No complicated data types can be used such as trees, stacks etc...
- Students number is unknown
- The programe will stop when the user insert -1 as agrade. Thanks
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By deschen on Jun 01, 2021 03:06 am
Assuming the following list: a <- data.frame(id = 1:3, x = 1:3) b <- data.frame(id = 3:1, y = 4:6) my_list <- list(a, b) my_list # [] # id x # 1 1 1 # 2 2 2 # 3 3 3 # [] # id y # 1 3 4 # 2 2 5 # 3 1 6
I now want to column bind the list elements into a data frame/tibble while matching the respective rows based on the id variable, i.e. the outcome should be: # A tibble: 3 x 3 id x y <int> <int> <int> 1 1 1 6 2 2 2 5 3 3 3 4
I know how I can do it with some pivoting, but I'm wondering if there's a smarter way of doing it and I hoped there was some binding function that simply allows for specifying an id column? Current approach: library(tidyverse) my_list %>% bind_rows() %>% pivot_longer(cols = -id) %>% filter(!is.na(value)) %>% pivot_wider()
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By Harry Will on Jun 01, 2021 01:26 am
In this answer given on implementing a thread-safe tree by jim-mischel, he states: The easiest way to do this would be to protect the entire tree with a ReaderWriterLockSlim. That allows concurrent access by multiple readers or exclusive access by a single writer. Any method that will modify the structure in any way will have to acquire the write lock, and no other threads will be allowed to read or write to the structure until that thread releases the write lock. If I'm following correctly, this would mean that the methods/properties for the tree structure would look something like: public class TreeNode { private String BackingData = ""; public String Data { get { lock (LockObject) return BackingData; } set { lock (LockObject) BackingData = value; } } private TreeNode BackingParent { get; set; } public TreeNode Parent { get { lock (LockObject) return BackingParent; } } //etc... private List<TreeNode> BackingChildren { get; } private Object LockObject { get; } TreeNode() { BackingData = ""; BackingParent = null; BackingChildren = new List<TreeNode>(); LockObject = new Object(); } }
The thing is, this is not protecting the entire tree - it's protecting not even individual nodes of a tree, and even then only the individual methods/properties. How could this be arranged such that the entire tree is protected? I did think about holding a static class that maps the root TreeNodes to an Object. Then, having a couple of methods in this static class that lock and unlock according to the root TreeNode using the Monitor methods. The Monitor.IsEntered method could be used within the TreeNodes, but to check that this is locked, we'd still need to walk up the unlocked tree to get the root TreeNode. Even then, I wouldn't know how to handle if IsEntered was false. Is there any suitable way to lock an object, and thus all child objects that may be held by said object?
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By Mohamed Moustafa on May 31, 2021 03:16 pm
I am trying to build a binary temporal image classifier by combining ResNet18 and an LSTM. However, I have never really used RNNs before and have been struggling on getting the correct output shape. I am using a batch size of 128 and a sequence size of 32. The images are 80x80 grayscale images. The current model is: class CNNLSTM(nn.Module): def __init__(self): super(CNNLSTM, self).__init__() self.resnet = models.resnet18(pretrained=False) self.resnet.conv1 = nn.Conv2d(1, 64, kernel_size=7, stride=2, padding=3) self.resnet.fc = nn.Sequential(nn.Linear(in_features=512, out_features=256, bias=True)) self.lstm = nn.LSTM(input_size=256, hidden_size=256, num_layers=3) self.fc1 = nn.Linear(256, 128) self.fc2 = nn.Linear(128, 1) def forward(self, x_3d): #x3d: torch.Size([128, 32, 1, 80, 80]) hidden = None toret = for t in range(x_3d.size(1)): x = self.resnet(x_3d[:, t, :, :, :]) out, hidden = self.lstm(x.unsqueeze(0), hidden) x = self.fc1(out[-1, :, :]) x = F.relu(x) x = self.fc2(x) print("x shape: ", x.shape) toret.append(x) return torch.stack(toret)
Which returns a tensor of shape torch.Size([32, 128, 1]) which, according to what I understand, means that every nth row represents the nth time step of each element in the sequence. How can I get output of shape 128x1x32 instead? And is there a better way to do this?
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By Nico on May 31, 2021 01:45 pm
I reckon this might be an old topic but I begin with Javascript... I get this error in my Javascript base code : "Fetch API cannot load file:///C:/Users[...]data.json. URL scheme must be "http" or "https" for CORS request" All the answers I see online says that a local server is needed to use fetch with a file. But I would need to find solutions without using a local server. Here is my code : function getData() { fetch('data.json') .then(res => res.json()) .then(data => { console.log(data) })
}; getData(); My files HTML et JS are well linked and my file data.json is located in the same folder. Somebody (who has understood my problem :) could give me some help/advice please? Thanks
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