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How to test if a string is basically an integer in quotes using Ruby
...!!(self =~ /\A[-+]?[0-9]+\z/)
end
end
An edited version according to comment from @wich:
class String
def is_i?
/\A[-+]?\d+\z/ === self
end
end
In case you only need to check positive numbers
if !/\A\d+\z/.match(string_to_check)
#Is not a positive number
else
...
Fastest way to check a string contain another substring in JavaScript?
...e from running the tests themselves, here are the current results for most common browsers, the percentages indicate performance increase over the next fastest result (which varies between browsers):
Chrome: indexOf (~98% faster) <-- wow
Firefox: cached RegExp (~18% faster)
IE11: cached RegExp(~...
Generating random strings with T-SQL
... , @string = @string output;
print @string;
Update 2016-02-17: See the comments bellow, the original procedure had an issue in the way it advanced the random seed. I updated the code, and also fixed the mentioned off-by-one issue.
...
Incrementing a date in JavaScript
...lt;!-- Script provides the `snippet` object, see http://meta.stackexchange.com/a/242144/134069 -->
<script src="//tjcrowder.github.io/simple-snippets-console/snippet.js"></script>
(This answer is currently accepted, so I can't delete it. Before it was accepted I suggested to t...
How do lexical closures work?
...and the closures all refer to the same i.
Here is the best solution I can come up with - create a function creater and invoke that instead. This will force different environments for each of the functions created, with a different i in each one.
flist = []
for i in xrange(3):
def funcC(j):
...
What data type to use for money in Java? [closed]
...
add a comment
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37
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How to create a HashMap with two keys (Key-Pair, Value)?
...
@pete Joshua Bloch, in Effective Java ch 3. s 9., recommends, "1. Store some constant nonzero value, say, 17, in an int variable called result ...", which works out better collision-wise if it's a prime. See also: stackoverflow.com/questions/3613102/…
–...
What's the best practice for putting multiple projects in a git repository? [closed]
...multiple independent branches, called orphan branches. Orphan branches are completely separate from each other; they do not share histories.
git checkout --orphan BRANCHNAME
This creates a new branch, unrelated to your current branch. Each project should be in its own orphaned branch.
Now for wh...
How to close a Java Swing application from the code
...ed a error (and solving it with System.exit is a very bad idea).
The most common culprits are java.util.Timer and a custom Thread you've created. Both should be set to daemon or must be explicitly killed.
If you want to check for all active frames, you can use Frame.getFrames(). If all Windows/Fra...
How can I override the OnBeforeUnload dialog and replace it with my own?
...eed to warn users about unsaved changes before they leave a page (a pretty common problem).
11 Answers
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