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Do sealed classes really offer performance Benefits?
...tips which say that you should mark your classes as sealed to get extra performance benefits.
12 Answers
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How to make a promise from setTimeout
...to JavaScript, they were added by the ES2015 spec (polyfills are available for outdated environments like IE8-IE11). The syntax they went with uses a callback you pass into the Promise constructor (the Promise executor) which receives the functions for resolving/rejecting the promise as arguments.
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@UniqueConstraint annotation in Java
...Column(unique=true)
String username;
The @UniqueConstraint annotation is for annotating multiple unique keys at the table level, which is why you get an error when applying it to a field.
References (JPA TopLink):
@UniqueConstraint
@Column
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Javascript Shorthand for getElementById
Is there any shorthand for the JavaScript document.getElementById? Or is there any way I can define one? It gets repetitive retyping that over and over .
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Is a Python list guaranteed to have its elements stay in the order they are inserted in?
...ues are both types of lists that provide specific (often limited) behavior for adding and removing elements (stacks being LIFO, queues being FIFO). Lists are practical representations of, well, lists of things. A string can be thought of as a list of characters, as the order is important ("abc" != "...
XAMPP - Port 80 in use by “Unable to open process” with PID 4! 12
I have been trying to figure out how to fix this problem for two days. I'm new to this kind of thing so I would appreciate it if someone could tell me how to fix it.
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How To Create Table with Identity Column
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I believe that is what I was looking for. I don't need to change the PK_History value to ID or anything?
– jp2code
May 23 '12 at 18:36
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Completion block for popViewController
...is the option to provide a completion block. Is there a similar equivalent for popViewController ?
18 Answers
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How to install trusted CA certificate on Android device?
...SSL traffic.
Extract from http://wiki.cacert.org/FAQ/ImportRootCert
Before Android version 4.0, with Android version Gingerbread & Froyo, there was a single read-only file ( /system/etc/security/cacerts.bks ) containing the trust store with all the CA ('system') certificates trusted by defa...
What is the easiest way in C# to trim a newline off of a string?
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The following works for me.
sb.ToString().TrimEnd( '\r', '\n' );
or
sb.ToString().TrimEnd( Environment.NewLine.ToCharArray());
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