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What special characters must be escaped in regular expressions?
... doubled-up (like "(\")(/)(\\.)" versus /(")(\/)(\.)/ in JavaScript)
Aside from escapes, different regex implementations may support different modifiers, character classes, anchors, quantifiers, and other features. For more details, check out regular-expressions.info, or use regex101.com to test you...
How to redirect all HTTP requests to HTTPS
...irect the "root" of your HTTP site to the root of your HTTPS site and link from there, only to HTTPS.
The problem is that if some link or form on the HTTPS site makes the client send a request to the HTTP site, its content will be visible, before the redirection.
For example, if one of your pages ...
How to horizontally center a
...y only needed because #inner has inherited a float of either left or right from somewhere else in your CSS.
– Doug McLean
Nov 12 '15 at 9:21
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Extension methods cannot be dynamically dispatched
...ot supported.
Cast the dynamic types to actual types, and it will work.
From what I see now, I'd say:
(string) ViewBag.MagNo
Which would result in
@foreach (var item in Model)
{
@Html.DropDownListFor(modelItem => item.TitleIds,
new SelectList(ViewBag.TitleNames as System.Collec...
Representing null in JSON
...ber is that the empty string and the number zero are conceptually distinct from null.
In the case of a count you probably always want some valid number (unless the count is unknown or undefined), but in the case of strings, who knows? The empty string could mean something in your application. Or m...
Finding row index containing maximum value using R
... max. I've found it useful for looking up the dates of near maximal values from another column.
– djhocking
Jul 31 '12 at 18:06
7
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How can I use “sizeof” in a preprocessor macro?
...s p__LINE__ as a variable. You would need a preproc macro and use __CONCAT from sys/cdefs.h .
– Coroos
Mar 2 at 11:37
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Create array of symbols
...
The original answer was written back in September '11, but, starting from Ruby 2.0, there is a shorter way to create an array of symbols! This literal:
%i[address city state postal country]
will do exactly what you want.
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How does OpenID authentication work?
...and very informative about what happens behind the scenes.
(Answer pasted from my answer at OpenID login workflow?.)
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Why use sprintf function in PHP?
...I want to use that string I can simply do this:
$name = 'Josh';
// $stringFromDB = 'Hello, My Name is %s';
$greeting = sprintf($stringFromDB, $name);
// $greetting = 'Hello, My Name is Josh'
Essentially it allows some separation in the code. If I use 'Hello, My Name is %s' in many places in my co...