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How do I check if an object has a specific property in JavaScript?
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I'm really confused by the answers that have been given - most of them are just outright incorrect. Of course you can have object properties that have undefined, null, or false values. So simply reducing the property check to typeo...
When do I use the PHP constant “PHP_EOL”?
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@Andre: How about anyone that writes apps to be installed, used and deployed by others? Are you suggesting these should all limit their "supported platforms" to *nix?
– Cylindric
Mar 4 '11 at 10:52
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Swift make method parameter mutable?
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answered Apr 4 '16 at 10:16
GeRyChGeRyCh
1,41233 gold badges1313 silver badges1919 bronze badges
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What is the purpose of willSet and didSet in Swift?
... for instance to notify other objects that the property just changed. When all you have is get/set, you need another field to hold the value. With willSet and didSet, you can take action when the value is modified without needing another field. For instance, in that example:
class Foo {
var myP...
How do I instantiate a Queue object in java?
...n't want to do this, but it's listed as an option for the sake of covering all the bases.
new Queue<Tree>() {
public Tree element() {
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};
public boolean offer(Tree element) {
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};
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};
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How do I create 7-Zip archives with .NET?
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If you can guarantee the 7-zip app will be installed (and in the path) on all target machines, you can offload by calling the command line app 7z. Not the most elegant solution but it is the least work.
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Hidden Features of Java
...en I first discovered it, never heard of it before.
ThreadLocals are typically not so widely known as a way to store per-thread state.
Since JDK 1.5 Java has had extremely well implemented and robust concurrency tools beyond just locks, they live in java.util.concurrent and a specifically interest...
Proper use of beginBackgroundTaskWithExpirationHandler
...l need to wrap it in a background task. It's also very important that you call endBackgroundTask when you're finished - otherwise the app will be killed after its allotted time has expired.
Mine tend look something like this:
- (void) doUpdate
{
dispatch_async(dispatch_get_global_queue(DISPAT...
Remove border radius from Select tag in bootstrap 3
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Here is a version that works in all modern browsers. The key is using appearance:none which removes the default formatting. Since all of the formatting is gone, you have to add back in the arrow that visually differentiates the select from the input. Note: ...
How to validate an OAuth 2.0 access token for a resource server?
...(RS) and Authorization Server (AS) for access token (AT) validation. It really depends on the AS's token format/strategy - some tokens are self-contained (like JSON Web Tokens) while others may be similar to a session cookie in that they just reference information held server side back at the AS.
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