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How can I validate a string to only allow alphanumeric characters in it?
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183
Use the following expression:
^[a-zA-Z0-9]*$
ie:
using System.Text.RegularExpressions;
Rege...
How to add multiple columns to a table in Postgres?
...o I add multiple columns in one query statement in PostgreSQL using pgadmin3?
2 Answers
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How do I create a new class in IntelliJ without using the mouse?
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edited Feb 24 '17 at 18:13
answered Feb 12 '10 at 3:47
Cra...
What's the difference between :: (double colon) and -> (arrow) in PHP?
...esolution, and it may have either a class name, parent, self, or (in PHP 5.3) static to its left. parent refers to the scope of the superclass of the class where it's used; self refers to the scope of the class where it's used; static refers to the "called scope" (see late static bindings).
The rul...
How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
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13 Answers
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Git alias with positional parameters
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371
The most obvious way is to use a shell function:
[alias]
files = "!f() { git diff --name-...
CodeIgniter removing index.php from url
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31 Answers
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Are static fields open for garbage collection?
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113
Static variables cannot be elected for garbage collection while the class is loaded. They can be...
How to select first and last TD in a row?
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383
You could use the :first-child and :last-child pseudo-selectors:
tr td:first-child,
tr td:las...