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Testing whether a value is odd or even
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I prefer using a bit test:
if(i & 1)
{
// ODD
}
else
{
// EVEN
}
This tests whether the first bit is on which signifies an odd number.
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How do I insert a linebreak where the cursor is without entering into insert mode in Vim?
...i^M^[
Explanation:
[Ctrl+V] means "quote the following character" -- it allows you to embed the newline and escape characters in the command.
So you're mapping the 'g' key to the sequence: i [Enter] [Escape]
This is vim for insert a newline before the cursor, then exit insert mode.
Tweaks:
Y...
Check if a string contains one of 10 characters
...mplest method, in my view:
var match = str.IndexOfAny(new char[] { '*', '&', '#' }) != -1
Or in a possibly easier to read form:
var match = str.IndexOfAny("*&#".ToCharArray()) != -1
Depending on the context and performance required, you may or may not want to cache the char array.
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How to mkdir only if a directory does not already exist?
...ered Apr 27 '09 at 14:49
Brian CampbellBrian Campbell
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What's the @ in front of a string in C#?
...declaration allows you to use reserved keywords as variable names.
For example:
string @class = "something";
int @object = 1;
I've only found one or two legitimate uses for this. Mainly in ASP.NET MVC when you want to do something like this:
<%= Html.ActionLink("Text", "Action", "Controller...
Get protocol, domain, and port from URL
...eed to extract the full protocol, domain, and port from a given URL. For example:
18 Answers
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When is a function too long? [closed]
...n level4 != null ? GetResources().Where(r => (r.Level2 == (int)level2) && (r.Level3 == (int)level3) && (r.Level4 == (int)level4)).ToList() : level3 != null ? GetResources().Where(r => (r.Level2 == (int)level2) && (r.Level3 == (int)level3)).ToList() : level2 != null ? Ge...
Synchronization vs Lock
java.util.concurrent API provides a class called as Lock , which would basically serialize the control in order to access the critical resource. It gives method such as park() and unpark() .
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form_for but to post to a different action
I want to have a form_for @user , but post to a custom action in the users controller.
6 Answers
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Is there any way to put malicious code into a regular expression?
...ar Expression Matching Can Be Simple And Fast
(but is slow in Java, Perl, PHP, Python, Ruby, ...) talks about ways that most modern NFAs, which all seem to derive from Henry Spencer’s code, suffer severe performance degradation, but where a Thompson‐style NFA has no such problems.
If you only ...