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Getting a better understanding of callback functions in JavaScript
...) {
// "this" may be different depending how you call the function
alert(this);
};
callback(argument_1, argument_2);
callback.call(some_object, argument_1, argument_2);
callback.apply(some_object, [argument_1, argument_2]);
The method you choose depends whether:
You have the arguments...
In Javascript/jQuery what does (e) mean?
I am new to JavaScript/jQuery and I've been learning how to make functions. A lot of functions have cropped up with (e) in brackets. Let me show you what I mean:
...
How can I detect if a selector returns null?
...
if ( $("#anid").length ) {
alert("element(s) found")
}
else {
alert("nothing found")
}
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How to present a simple alert message in java?
Coming from .NET i am so used calling Alert() in desktop apps. However in this java desktop app, I just want to alert a message saying "thank you for using java" I have to go through this much suffering:
...
How to quit android application programmatically
...e pretty close to closing all related activities by its name and Javadoc description:
this.finishAffinity();
Finish this activity as well as all activities immediately below it in the current task that have the same affinity. This is typically used when an application can be launched on to another...
jQuery .ready in a dynamically inserted iframe
...omeone clicks on a picture. In this iframe, we are using galleria a javascript library to display multiple pictures.
10 ...
Does IE9 support console.log, and is it a real function?
...red to inherit from Object, nor its methods from Function, like native ECMAScript functions and objects do. This is the reason apply and call are undefined on those methods. In IE 9, most DOM objects were improved to inherit from native ECMAScript types. As the developer tools are considered an e...
Javascript communication between browser tabs/windows [duplicate]
What's the most reliable way to have Javascript communicate between tabs/windows of the same browser? For example, when Tab 2 starts audio playback, Tab 1 somehow knows about this and can pause it's player.
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Does a javascript if statement with multiple conditions test all of them?
...e cases the bitwise operators & and | can be used
var testOr = true | alert(""); //alert pops up
var testAnd = false & alert(""); //alert pops up
These should be used really carefully because bitwise operators are arithmetic operators that works on single bits of their operand and can't a...
Regular expression to get a string between two strings in Javascript
...
In Javascript, you actually need to use ([\s\S]*?) rather than (.*?).
– Qian Chen
Dec 18 '18 at 11:07
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