Dev Stack Source

Example: javascript online compiler Foor good JS compilers https : / / playcode . io / https : / / jsfiddle . net / https : / / js . do / https : / / jseditor . io /

Example: brooklyn nine nine Yeah this show seems to be great

Answer : When using observe:response , don't type the call ( post<Blob>(...) ), as the returned Observable will be of HttpResponse. So this should work: this.httpclient.post('MyBackendUrl', params, {observe: 'response', responseType: 'blob'} ); Why this happens, is there's two versions of the post method, one with a generic type, one without: /** * Construct a POST request which interprets the body as JSON and returns the full event stream. * * @return an `Observable` of all `HttpEvent`s for the request, with a body type of `T`. */ post<T>(url: string, body: any | null, options: { headers?: HttpHeaders | { [header: string]: string | string[]; }; observe: 'events'; params?: HttpParams | { [param: string]: string | string[]; }; reportProgress?: boolean; responseType?: 'json'; withCredentials?: boolean

Example: inch to cm 1 inch = 2.54 cm

Example: expo vector icons install npm install @expo/vector-icons

Example: bubble sort in java public static void bubbleSort ( int arr [ ] ) { for ( int i = 0 ; i < arr . length ; i ++ ) //number of passes { //keeps track of positions per pass for ( int j = 0 ; j < ( arr . length - 1 - i ) ; j ++ ) //Think you can add a -i to remove uneeded comparisons { //if left value is great than right value if ( arr [ j ] > arr [ j + 1 ] ) { //swap values int temp = arr [ j ] ; arr [ j ] = arr [ j + 1 ] ; arr [ j + 1 ] = temp ; } } } }

Example: Rectangle area hackerrank solution in c++ # include <iostream> using namespace std ; /* * Create classes Rectangle and RectangleArea */ class Rectangle { protected : int width ; int height ; public : virtual void display ( ) const { cout << width << ' ' << height << endl ; } } ; class RectangleArea : public Rectangle { public : void display ( ) const override { cout << ( width * height ) << endl ; } void read_input ( ) { cin >> width >> height ; } } ; int main ( ) { /* * Declare a RectangleArea object */ RectangleArea r_area ; /* * Read the width and height */ r_area . read_input ( ) ; /* * Print the width and height */ r_area . Rectangle :: display ( ) ; /* * Pri

Answer : The code you have is a white with low opacity. If something white with a low opacity is above something black, you end up with a lighter shade of gray. Above red? Lighter red, etc. That is how opacity works. Here is a simple demo. If you want it to look 'more white', make it less opaque: background:rgba(255,255,255, 0.9); Demo I believe rgba( 0, 0, 0, 0.8 ) is equivalent in shade with #333 . Live demo: http://jsfiddle.net/8MVC5/1/

Example 1: css fill parent height html, body { height: 100% } body { display: flex; align-items: stretch; } #root { width: 100% } Example 2: css fill parent height #root { position: absolute; top: 0; left: 0; height: 100%; width: 100%; }

Example: c escape characters Escape HEX in ASCII Character represented \a 07 Alert ( Beep , Bell ) ( added in C89 ) \b 08 Backspace \e 1 B Escape character \f 0 C Formfeed Page Break \n 0 A Newline ( Line Feed ) ; see notes below \r 0 D Carriage Return \t 09 Horizontal Tab \v 0 B Vertical Tab \\ 5 C Backslash \' 27 Apostrophe or single quotation mark \" 22 Double quotation mark \ ? 3F Question mark ( used to avoid trigraphs ) \nnn any The byte whose numerical value is given by nnn interpreted as an octal number \xhh… any The byte whose numerical value is given by hh… interpreted as a hexadecimal number \uhhhh none Unicode code point below 10000 hexadecimal \Uhhhhhhhh none Unicode code point where h is a hexadecimal digit

Example: cos2x import math num = int(input("Enter an angle (in degrees)")) print(math.cos(2*num))

Answer : You can just download the android-NDK from their archives and integrate it with your android studio. You can download android-NDK 15 from the given URL: https://developer.android.com/ndk/downloads/older_releases To connect it with android studio, extract it into your drive and in android studio, go to File -> Project Structure -> SDK Location -> NDK Path (Put extracted path here) If you're using Gradle plugin 3.5 or later (in beta at time of writing, but will be out soon), add the following to your build.gradle: android { ndkVersion "19.2.5345600" // NDK r19c } If you're using an older Gradle plugin, you can download old NDK releases from https://developer.android.com/ndk/downloads/older_releases and point ndk.dir in your local.properties file at that instead. As stated in the docs: Use the sdkmanager tool to view versions of CMake and NDK packages that are available: sdkmanager --list Pass the sdkmanager the strings

Example: how to combine data from mapping in new array const a = a; gdb: [i] ,=>{ mdrigm

Example 1: sass darken darken ( $color , $amount ) // darken ( #FFF , 30 % ) Example 2: scss darken darken ( $color , $amount )

Example: compilation vs runtime error in c A runtime error happens during the running of the program. A compiler error happens when you try to compile the code. If you are unable to compile your code, that is a compiler error. If you compile and run your code, but then it fails during execution, that is runtime.

Example: underline text using css /* Using 'text-decoration' property with 'underline' value. we can draw underline below the text using css */ <style > p { text-decoration : underline ; } </style> <p>Hello all Welcome here !!!</p>

Answer : If you haven't yet commited the changes, then: git diff > mypatch.patch But sometimes it happens that part of the stuff you're doing are new files that are untracked and won't be in your git diff output. So, one way to do a patch is to stage everything for a new commit ( git add each file, or just git add . ) but don't do the commit, and then: git diff --cached > mypatch.patch Add the 'binary' option if you want to add binary files to the patch (e.g. mp3 files): git diff --cached --binary > mypatch.patch You can later apply the patch: git apply mypatch.patch git diff for unstaged changes. git diff --cached for staged changes. git diff HEAD for both staged and unstaged changes. git diff and git apply will work for text files, but won't work for binary files. You can easily create a full binary patch, but you will have to create a temporary commit. Once you've made your temporary commit(s), you can create the patch with: git fo

Example: coronavirus trakcer Wear your damn mask.

Answer : You can do this by using the parent property on the ActivatedRoute - something like this. export class MyComponent implement OnInit { constructor(private activatedRoute: ActivatedRoute) {} ngOnInit() { this.activatedRoute.parent.url.subscribe((urlPath) => { const url = urlPath[urlPath.length - 1].path; }) } } You can see everything from the ActivatedRoute in more detail here: https://angular.io/api/router/ActivatedRoute You can check for parent route by determining if only one slash is present in it: constructor(private router: Router) {} ngOnInit() { this.router.events.pipe(filter(e => e instanceof NavigationEnd)).subscribe((x: any) => { if (this.isParentComponentRoute(x.url)) { // logic if parent main/parent route } }); } isParentComponentRoute(url: string): boolean { return ( url .split('') .reduce((acc: number, curr: string)

Answer : It seems like these are the issues in your code: You need to convert lat1 and lon1 to radians before calling your function. You may be scaling radialDistance incorrectly. Testing a floating-point number for equality is dangerous. Two numbers that are equal after exact arithmetic might not be exactly equal after floating-point arithmetic. Thus abs(x-y) < threshold is safer than x == y for testing two floating-point numbers x and y for equality. I think you want to convert lat and lon from radians to degrees. Here is my implementation of your code in Python: #!/usr/bin/env python from math import asin,cos,pi,sin rEarth = 6371.01 # Earth's average radius in km epsilon = 0.000001 # threshold for floating-point equality def deg2rad(angle): return angle*pi/180 def rad2deg(angle): return angle*180/pi def pointRadialDistance(lat1, lon1, bearing, distance): """ Return final coordinates (lat2,lon2) [in degrees] given

Answer : An X server is a program in the X Window System that runs on local machines (i.e. the computers used directly by users) and handles all access to the graphics cards, display screens and input devices (typically a keyboard and mouse) on those computers. With that said Colab runs as a terminal instance in the server, if you are using GPU runtime, then the problem is not with X server accessing your Graphics card, neither with Input devices, generally this occurs when you try to parse some data that should be displayed as separate window on your desktop, commands like cv2.imshow() , there can be other similar functions that can cause this problem, if you have to use graphical ouput you might want to look into %matplotlib notebook and displaying the data in the interactable matplot plots. If this is not your issue, just post a link to your modified code and I might be able to help more. I had the same problem in Colab for a simple OpenCV program to track a tennis ball in

Answer : Is there a way to prevent a full table scan during the alter table statement? At this time there is no supported, safe way to do that with PostgreSQL. Some kind of ALTER TABLE ... ADD CONSTRAINT ... CONCURRENTLY would be nice, but nobody's implemented it. Same with the alternative of adding a NOT VALID constraint that still affects new rows, and that you then VALIDATE later - it'd be good, and it's something everyone knows is needed but nobody's had the time or funding to add yet. In theory you could directly modify the system catalogs to add the constraint if you know it is true and valid. In practice, well, it's generally not a great idea. So no, there isn't really a way. One potential alternative is to create a check constraint using NOT VALID , then validating the check constraint later. This method requires holding an ACCESS EXCLUSIVE lock only for the duration to create the constraint, which should be on the order of millisecon