Newbe Dev Stack

Example 1: how to convert string to int js let string = "1" ; let num = parseInt ( string ) ; //num will equal 1 as a int Example 2: Javascript string to int var myInt = parseInt ( "10.256" ) ; //10 var myFloat = parseFloat ( "10.256" ) ; //10.256 Example 3: string to number javascript // Method - 1 ### parseInt() ### var text = "42px" ; var integer = parseInt ( text , 10 ) ; // returns 42 // Method - 2 ### parseFloat() ### var text = "3.14someRandomStuff" ; var pointNum = parseFloat ( text ) ; // returns 3.14 // Method - 3 ### Number() ### Number ( "123" ) ; // returns 123 Number ( "12.3" ) ; // returns 12.3 Number ( "3.14someRandomStuff" ) ; // returns NaN Number ( "42px" ) ; // returns NaN Example 4: convert string to number javascript var myString = "869.99" var myFloat = parseFloat ( myString ) var myInt = parseInt ( myString ) Example

Answer : The CSS specification requires that position:fixed be anchored to the viewport, not the containing positioned element. If you must specify your coordinates relative to a parent, you will have to use JavaScript to find the parent's position relative to the viewport first, then set the child (fixed) element's position accordingly. ALTERNATIVE : Some browsers have sticky CSS support which limits an element to be positioned within both its container and the viewport. Per the commit message: sticky ... constrains an element to be positioned inside the intersection of its container box, and the viewport. A stickily positioned element behaves like position:relative (space is reserved for it in-flow), but with an offset that is determined by the sticky position. Changed isInFlowPositioned() to cover relative and sticky. Depending on your design goals, this behavior may be helpful in some cases. It is currently a working draft, and has decent suppo

Answer : It appears to require Safari 6, which has not been released for Windows. Regarding the unavailability of Safari 6 on Windows, Apple has stated "Safari 6 is available for Mountain Lion and Lion. Safari 5 continues to be available for Windows." I regularly use weinre . It basically runs a webserver that in turn acts as an inspector-enhanced proxy to browse webpages and websites. The inspector can be started by adding a script to your page or running a bookmarklet. weinre is a debugger for web pages, like FireBug (for FireFox) and Web Inspector (for WebKit-based browsers), except it's designed to work remotely, and in particular, to allow you debug web pages on a mobile device such as a phone. To install it, you will need NodeJS and NPM (included with NodeJS). You will also need a WebKit-based browser on the desktop/receiver end (Safari, Google Chrome, or Chromium). It should work on Windows, OSX, and Linux. Official page: https://people.apache.org/~p

Example 1: disable textarea resize textarea { /* for all text* area elements */ resize : none ; } #foo { /* for particular id */ resize : none ; } Example 2: make textarea not resizable You can either apply this as an inline style property like so: <textarea style="resize: none;" > </textarea > or in between <style > ...</style > element tags like so: textarea { resize : none ; }

Example 1: python sort list in reverse #1 Changes list list . sort ( reverse = True ) #2 Returns sorted list sorted ( list , reverse = True ) Example 2: sort array python array = [ 1 , 2 , 3 , 19 , 11 , 90 , 0 ] array . sort ( ) print ( array ) Example 3: sort an array python #List myList = [ 1 , 5 , 3 , 4 ] myList . sort ( ) print ( myList ) #[1,3,4,5] Example 4: sort python >> > x = [ 1 , 11 , 2 , 3 ] >> > y = sorted ( x ) >> > x [ 1 , 11 , 2 , 3 ] >> > y [ 1 , 2 , 3 , 11 ] Example 5: sorting python array sorted ( list , key = . . . , reverse = . . . ) Example 6: python sort list vowels = [ 'e' , 'a' , 'u' , 'o' , 'i' ] vowels . sort ( )

Example 1: map arduino Syntax map ( value , fromLow , fromHigh , toLow , toHigh ) Parameters value : the number to map . fromLow : the lower bound of the value’s current range . fromHigh : the upper bound of the value’s current range . toLow : the lower bound of the value’s target range . toHigh : the upper bound of the value’s target range . Example : map ( val , 0 , 255 , 0 , 1023 ) ; Example 2: arduino map function long map ( long x , long in_min , long in_max , long out_min , long out_max ) { return ( x - in_min ) * ( out_max - out_min ) / ( in_max - in_min ) + out_min ; }

Example 1: bootstrap left image right text < div class = " card " > < div class = " row no-gutters " > < div class = " col-auto " > < img src = " //placehold.it/200 " class = " img-fluid " alt = " " > </ div > < div class = " col " > < div class = " card-block px-2 " > < h4 class = " card-title " > Title </ h4 > < p class = " card-text " > Description </ p > < a href = " # " class = " btn btn-primary " > BUTTON </ a > </ div > </ div > </ div > < div class = " card-footer w-100 text-muted " > Footer stating cats are CUTE little animals

Example 1: java split array into two String [ ] array = { "0" , "1" , "2" , "3" , "4" , "5" , "6" , "7" , "8" , "9" } ; String [ ] a = Arrays . copyOfRange ( array , 0 , 4 ) ; //<- (targetArray, start, to) String [ ] b = Arrays . copyOfRange ( array , 4 , array . length ) ; Output : a : 0 , 1 , 2 , 3 b : 4 , 5 , 6 , 7 , 8 , 9 Example 2: java split string String yourString = "Hello/Test/World" ; String [ ] strings = yourString . split ( "/" /*<- Regex */ ) ; Output : strings = [ Hello , Test , World ] Example 3: How to split a string in Java String string = "004-034556" ; String [ ] parts = string . split ( "-" ) ; String part1 = parts [ 0 ] ; // 004 String part2 = parts [ 1 ] ; // 034556 Example 4: split method in java public class SplitExample2 { public static void main ( String

Example: arduino substring myString.substring(from, to)

Answer : You can use the flex-column flexbox utility class to stack the 2 navs vertically next to the icon. This sets flex-direction: column on the navbar-collapse div so that it's child elements stack vertically. <nav class="navbar navbar-toggleable-md navbar-inverse bg-inverse"> <div class="container"> <button class="navbar-toggler navbar-toggler-right align-self-center mt-3" type="button" data-toggle="collapse" data-target="#navbarCollapse"> <span class="navbar-toggler-icon"></span> </button> <h1 class="py-2 ml-lg-2 mx-3"><a href="#"><i class="fa fa-envelope-o fa-lg mt-2" aria-hidden="true"></i></a></h1> <div class="collapse navbar-collapse flex-column ml-lg-0 ml-3" id="navbarCollapse"> <ul class="

Answer : The problem was with android studio indexing. Follow the steps.. Go to 'File' > 'Invalidate caches/restart' Now the studio will shut down and restart. Now indexing begins. On completion of indexing you will find the Suggestion boxes with every possible suggestions. For me, the problem was that "Show import popup" was not checked at File > Settings > Editor > General > Auto Import > Java.

Answer : First, check that you use latest version of jQuery library: Older versions directly restrict unknown methods (PATCH is new one). I've tested on jQuery 1.7 - PATCH method working without problems. Second, not all browsers supports PATCH method using XMLHttpRequest: Like, IE 7,8 (9+ works okay) have XMLHttpRequest, but it throws an error on PATCH: new XMLHttpRequest().open('PATCH', '/'); //Illegal argument To fix this, you may force jQuery to use the old proprietary ActiveXObject xhr, like so: $.ajax({ url : 'http://127.0.0.1:8001/api/v1/pulse/7/', data : data, type : 'PATCH', contentType : 'application/json', xhr: function() { return window.XMLHttpRequest == null || new window.XMLHttpRequest().addEventListener == null ? new window.ActiveXObject("Microsoft.XMLHTTP") : $.ajaxSettings.xhr(); } }); A bit late, but this worked for me when I got

Answer : aren't you dividing by zero here when host = 0 in the for loop? updateProgress(100/host); you can use a variable hosts to keep track of the number of hosts you have.Then the progress will be as below. var hosts = 23;// total number of hosts updateProgress((host/hosts)*100); The other thing is the ajax you're firing is asynchronous, so what's happening is it fires and doesn't wait for the results. You can either "scan" each host serially one at a time updating the progress bar or scan all of them simultaneously having the progress bar update as the asynch results come back. Can you specify which behavior you're trying to achieve? [UPDATE] toggle async flag in the ajax call below for what you want. function updateProgress(percentage){ if(percentage > 100) percentage = 100; $('#progressBar').css('width', percentage+'%'); $('#progressBar').html(percentage+'%'); } var hosts = 23; va

Example: difference between ddl and dml DDL 1-It stands for Data Definition Language. 2-It is used to create database schema and can be used to define some constraints as well. 3-It basically defines the column (Attributes) of the table. 4-It doesn’t have any further classification. 5-Basic command present in DDL are CREATE, DROP, RENAME, ALTER etc. 6-DDL does not use WHERE clause in its statement. DML 1-It stands for Data Manipulation Language. 2-It is used to add, retrieve or update the data. 3-It add or update the row of the table. These rows are called as tuple. 4-It is further classified into Procedural and Non-Procedural DML. 5-BASIC command present in DML are UPDATE, INSERT, MERGE etc. 6-While DML uses WHERE clause in its statement.

Example: hex color picker For anyone wondering, hex color is just in base 16. So 255 (max color) is FF. The 6 long string of characters is just the Red Green and Blue channels (RRGGBB). Which means you shouldn't have to look it up unless you're going for an exact color. Hex numbers: 0 1 2 3 4 5 6 7 8 9 A B C D E F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21.. etc.

Answer : Even though borderBottom doesn't work on the Text component, it did work for me on the TextInput component, just set editable to false and set the value to your desired text as so... <TextInput style={styles.textInput} editable={false} value={'My Text'}/> const styles = StyleSheet.create({ textInput: { borderBottomColor: 'black', borderBottomWidth: 1, } }); This isn't currently possible. See the following RN issue: https://github.com/facebook/react-native/issues/29 and this ticket on Product Pains: https://productpains.com/post/react-native/add-borderwidth-left-right-top-bottom-to-textinput-/

Answer : This may be a bit of a ‘hack’, but does the job with very little effort, but just with a different error message if the constant is not declared in the child class. A self-referential constant declaration is syntactically correct and parses without problem, only throwing an error if that declaration is actually executed at runtime, so a self-referential declaration in the abstract class must be overridden in a child class else there will be fatal error: Cannot declare self-referencing constant . In this example, the abstract, parent class Foo forces all its children to declare the variable NAME . This code runs fine, outputting Donald . However, if the child class Fooling did not declare the variable, the fatal error would be triggered. <?php abstract class Foo { // Self-referential 'abstract' declaration const NAME = self::NAME; } class Fooling extends Foo { // Overrides definition from parent class // Without this declaration, an

Example 1: Error: Cannot find module 'express' You need to install Express locally into the context of your application (node_modules folder): $ npm install express Example 2: Cannot find module 'express' $ npm install express

Answer : Add the below to your manifest: <activity android:name=".AppPreferenceActivity" android:label="@string/app_name"> <intent-filter> <action android:name="com.scytec.datamobile.vd.gui.android.AppPreferenceActivity" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </activity> in my case, i was sure that the action is correct, but i was passing wrong URL, i passed the website link without the http:// in it's beginning, so it caused the same issue, here is my manifest (part of it) <activity android:name=".MyBrowser" android:label="MyBrowser Activity" > <intent-filter> <action android:name="android.intent.action.VIEW" /> <action android:name="com.dsociety.activities.MyBrowser" /> <category android:name

Example: chromium for linux sudo apt install -y chromium-browser # You can also install it from the software center

Answer : Hetzner had stopped assigning public IPv4 addresses to virtual servers. As far as I can tell this change happened when they changed the product name from VQ to CX. The usage of NAT is not mentioned in the product description though. Eventually Hetzner introduced a newer cloud platform in which VMs get real public IPv4 addresses and a routed /64 IPv6 prefix. Both versions share the CX name. Virtual servers ordered in 2012 and 2013 would keep their public IPv4 address until 2019 when the VQ line was discontinued. But virtual servers ordered in 2016 only have an RFC1918 address, and Hetzner will not route a public IPv4 address to such a virtual server. They still allocated a dedicated public IPv4 address to each virtual server, which they NAT to the assigned RFC1918 address. Hetzner believed this was not a problem because it was a 1:1 NAT. As you found out, this is error prone when configuring the server. You have to know about this NAT. And you have to look up the map

Example 1: flutter background image Widget build(BuildContext context) { return MaterialApp( title: 'Welcome to Flutter', home: Container( decoration: BoxDecoration( image: DecorationImage( image: AssetImage("images/logo.png"), fit: BoxFit.cover)), child: Scaffold( backgroundColor: Colors.transparent, appBar: AppBar( elevation: 0, backgroundColor: Colors.transparent, title: Text('My App'), centerTitle: true, leading: IconButton( icon: Icon( Icons.list, color: Colors.white, ), onPressed: () {}), ), ), ), ); } Example 2: add bg image to scaffold flutter @override Widget build(BuildContext context) { return new Scaffold( body: new Stack( children: [ new Container( decoration: ne

Example 1: array_search in php <?php $array = array ( 0 => 'blue' , 1 => 'red' , 2 => 'green' , 3 => 'red' ) ; $key = array_search ( 'green' , $array ) ; // $key = 2; $key = array_search ( 'red' , $array ) ; // $key = 1; ?> Example 2: php indexof strrpos ( string $haystack , mixed $needle [ , int $offset = 0 ] ) : int Example 3: php indexof strrpos ( string $haystack , mixed $needle [, int $offset = 0 ] ) : int or False return <?php $foo = "0123456789a123456789b123456789c" ; // Looking for '0' from the 0th byte (from the beginning) var_dump ( strrpos ( $foo , '0' , 0 ) ) ; // Looking for '0' from the 1st byte (after byte "0") var_dump ( strrpos ( $foo , '0' , 1 ) ) ; $str = 'This is Main String' ; if ( strpos ( $str , 'This' ) !== false ) { echo 'true' ; }

Example 1: how change your github username and password in terminal git config --global user.email "you@example.com" git config --global user.name "Your Name" git config --global user.password "your password" Example 2: change global user name git $ git config --global user.name "Mona Lisa"

Answer : The manual exists on Asus' support site and it contains the beep codes on page 2-16 ("Chapter 2: Getting Started"):

Example 1: youtube to mp4 ytmp3.cc is the best by far Example 2: youtube to mp4 flvto.biz is great for it