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Get the index of the object inside an array, matching a condition
...ex = a.findIndex(x => x.prop2 ==="yutu");
console.log(index);
It's supported in Google Chrome, Firefox and Edge. For Internet Explorer, there's a polyfill on the linked page.
Performance note
Function calls are expensive, therefore with really big arrays a simple loop will perform muc...
How are Anonymous inner classes used in Java?
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By an "anonymous class", I take it you mean anonymous inner class.
An anonymous inner class can come useful when making an instance of an object with certain "extras" such as overriding methods, without having to actually subclass a class.
I tend to use i...
What is the purpose of fork()?
... have seen code using fork() . Why do we need to use fork() and what is its purpose?
15 Answers
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Maven Install on Mac OS X
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OS X prior to Mavericks (10.9) actually comes with Maven 3 built in.
If you're on OS X Lion, you won't have java installed by default. Just run java by itself and it'll prompt you to install it.
Assuming qualifications are met, run mvn -version and see some output li...
How to use PrimeFaces p:fileUpload? Listener method is never invoked or UploadedFile is null / throw
...ut the general browser behavior is unspecified and dependent on form composition and webbrowser make/version. Just always specify it to be on the safe side.
When using mode="advanced" (i.e. ajax upload, this is the default), then make sure that you've a <h:head> in the (master) template. This ...
Is Random class thread safe?
Is it valid to share one instance of the Random class between multiple threads? And to call nextInt(int) from multiple threads in particular?
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How do I load my script into the node.js REPL?
I have a script foo.js that contains some functions I want to play with in the REPL.
11 Answers
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What's “requestCode” used for on PendingIntent?
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edited Apr 26 '17 at 19:21
stkent
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SSL Error: CERT_UNTRUSTED while using npm command
...sonally I believe bypassing https is not the real solution, but we can use it as a workaround.
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What is the difference between an interface and a class, and why I should use an interface when I ca
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Interfaces are excellent when you want to create something like it:
using System;
namespace MyInterfaceExample
{
public interface IMyLogInterface
{
//I want to have a specific method that I'll use in MyLogClass
void WriteLog();
}
public class MyCl...