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How do you check if a variable is an array in JavaScript? [duplicate]
...ke to check whether a variable is either an array or a single value in JavaScript.
23 Answers
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Why do people use Heroku when AWS is present? What distinguishes Heroku from AWS? [closed]
...aaS:
Hardware acquisition
Operating System
Server Software
Server Side Scripting Environment
Web server
Database Management System(Mysql, Redis etc)
Configure production server
Tool for testing and deployment
Monitoring App
High Availability
Load Blancing/ Http Routing
Service Backup Policies
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Create an enum with string values
.../ this will show message '0' which is number representation of enum member
alert(States.Active);
// this will show message 'Disabled' as string representation of enum member
alert(States[States.Disabled]);
Update 1
To get number value of enum member from string value, you can use this:
var str...
How do you check that a number is NaN in JavaScript?
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Use this code:
isNaN('geoff');
See isNaN() docs on MDN.
alert ( isNaN('abcd')); // alerts true
alert ( isNaN('2.0')); // alerts false
alert ( isNaN(2.0)); // alerts false
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Preserve Line Breaks From TextArea When Writing To MySQL
...I think, choosing and styling <pre></pre> much much better for xss.
– EGurelli
Oct 29 '16 at 0:08
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Keyboard shortcuts with jQuery
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<script type="text/javascript">
$(document).ready(function(){
$("#test").keypress(function(e){
if (e.which == 103)
{
alert('g');
};
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How can I use a batch file to write to a text file?
I need to make a script that can write one line of text to a text file in the same directory as the batch file.
7 Answers
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Is it possible to override JavaScript's toString() function to provide meaningful output for debuggi
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While it is true the alert function will display the return value of the function overriding the prototype toString property, Object.prototype.toString.call(f) will still display [object Object].
– Frederik Krautwald
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How do you create a hidden div that doesn't create a line break or horizontal space?
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Show / hide by mouse click:
<script language="javascript">
function toggle() {
var ele = document.getElementById("toggleText");
var text = document.getElementById("displayText");
if (ele.style.display == "block") {
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Avoid browser popup blockers
I'm developing an OAuth authentication flow purely in JavaScript and I want to show the user the "grant access" window in a popup, but it gets blocked.
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