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How to directly initialize a HashMap (in a literal way)?
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All Versions
In case you happen to need just a single entry: There is Collections.singletonMap("key", "value").
For Java Version 9 or higher:
Yes, this is possible now. In Java 9 a couple of factory methods have been added that si...
How to check if a string is a valid hex color representation?
...ny integer from 0 to 9 and any letter from A to F
{6} -> the previous group appears exactly 6 times
$ -> match end
i -> ignore case
If you need support for 3-character HEX codes, use the following:
/^#([0-9A-F]{3}){1,2}$/i.test('#ABC')
The only difference here ...
Setting the correct encoding when piping stdout in Python
...cause Python encodes the output to whatever encoding your terminal application is using. If you are piping you must encode it yourself.
A rule of thumb is: Always use Unicode internally. Decode what you receive, and encode what you send.
# -*- coding: utf-8 -*-
print u"åäö".encode('utf-8')
An...
New lines inside paragraph in README.md
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according to stackoverflow.com/questions/18019957/… Github-favored markdown is not used everywhere on Github. Might be outdated though.
– Ben Creasy
Mar 18 '17 at 22:48
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List All Redis Databases
...nstance). The number of Redis databases is fixed, and set in the configuration file. By default, you have 16 databases. Each database is identified by a number (not a name).
You can use the following command to know the number of databases:
CONFIG GET databases
1) "databases"
2) "16"
You can use...
Determine if a function exists in bash
...cript. This script usualy contains an init(), execute() and cleanup() functions. But they are not mandatory. I'd like to test if they are or are not defined.
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What is the difference between vmalloc and kmalloc?
...oc(), you can use GFP_KERNEL. You're not an interrupt handler: the application code enters the kernel context by means of a trap, it is not an interrupt.
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What does the tilde (~) mean in my composer.json file?
.... In your case, it is equivalent to >= 2.0, < 3.0.
The full explanation is at Tilde Version Range docs page:
The ~ operator is best explained by example: ~1.2 is equivalent to >=1.2 <2.0.0, while ~1.2.3 is equivalent to >=1.2.3 <1.3.0.
Another way of looking at it is that...
Retrieve the position (X,Y) of an HTML element relative to the browser window
I want to know how to get the X and Y position of HTML elements such as img and div in JavaScript relative to the browser window.
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Difference between jQTouch and jQuery mobile
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Additionally to Aaron's answer this is what I've come up with so far:
jQuery Mobile is an offical and generally more active jQuery project (alpha 4.1 - April 7, 2011) whereas jQTouch, created in 2009 by David Kaneda, has been re...