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Verifying that a string contains only letters in C#
...egex.IsMatch(input, @"^[a-zA-Z0-9]+$");
Only letters, numbers and underscore:
Regex.IsMatch(input, @"^[a-zA-Z0-9_]+$");
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Get the first key name of a javascript object [duplicate]
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Works on browsers as well
– Alon Amir
Jul 10 '12 at 20:08
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Force browser to download image files on click
...h the same file name (in this example image.png).
If you specify a value for this attribute, then that will become the new filename:
<a href="/path/to/image.png" download="AwesomeImage.png">
UPDATE: As of spring 2018 this is no longer possible for cross-origin hrefs. So if you want to creat...
Which equals operator (== vs ===) should be used in JavaScript comparisons?
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The strict equality operator (===) behaves identically to the abstract equality operator (==) except no type conversion is done, and the types must be the same to be considered equal.
Reference: Javascript Tutorial: Comparison Operators
The == opera...
Checking if jquery is loaded using Javascript
...y Jquery Library is loaded onto my HTML page. I am checking to see if it works, but something is not right. Here is what I have:
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How to restart Jenkins manually?
I've just started working with Jenkins and have run into a problem. After installing several plugins it said it needs to be restarted and went into a "shutting down" mode, but never restarts.
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Handling warning for possible multiple enumeration of IEnumerable
...ed to use an IEnumerable<> several times thus get the Resharper error of "Possible multiple enumeration of IEnumerable ".
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A KeyValuePair in Java [duplicate]
I'm looking for a KeyValuePair class in Java.
Since java.util heavily uses interfaces there is no concrete implementation provided, only the Map.Entry interface.
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What is a StackOverflowError?
What is a StackOverflowError , what causes it, and how should I deal with them?
15 Answers
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What is the equivalent of the C++ Pair in Java?
...ter practice is to write a very simple class, like the one Mike proposed, for each application you would have made of the Pair class. Map.Entry is an example of a pair that carry its meaning in its name.
To sum up, in my opinion it is better to have a class Position(x,y), a class Range(begin,end) a...