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How to detect if multiple keys are pressed at once using JavaScript?
...can remember what they were.
You should also put the key codes in the same order as the documentation (CTRL+ENTER => map[17] && map[13], NOT map[13] && map[17]). This way you won't ever get confused when you need to go back and edit the code.
A gotcha with if-else chains
If checki...
Xcode source automatic formatting
...ly does indentation. What about moving braces, taking care of line breaks, etc?
– Peter Ajtai
Apr 30 '12 at 0:56
15
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Convert hex string to int in Python
...59
>>> print int("10", 0)
10
(You must specify 0 as the base in order to invoke this prefix-guessing behavior; omitting the second parameter means to assume base-10.)
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What is the easiest way to get current GMT time in Unix timestamp format?
...fferent packages ( datetime , time , calendar ) as can be seen here in order to deal with time. I made a big mistake by using the following to get current GMT time time.mktime(datetime.datetime.utcnow().timetuple())
...
download file using an ajax request
... the DOM, and reference it as my link rather than create one on the fly in order for the file to download automatically.
– Erik Donohoo
May 31 '17 at 20:49
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importing pyspark in python shell
...se scripts will take care of both, i.e. they set up your PYTHONPATH, PATH, etc, so that your script can find pyspark, and they also start the spark instance, configuring according to your params, e.g. --master X
Alternatively, it is possible to bypass these scripts and run your spark application di...
Array.push() if does not exist?
...: Computes the union of the passed-in arrays: the list of unique items, in order, that are present in one or more of the arrays.
_.union([1, 2, 3], [101, 2, 1, 10], [2, 1]);
=> [1, 2, 3, 101, 10]
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Double vs single quotes
...
A single-quoted strings don’t process ASCII escape codes( \n, \t etc), and they
don’t do string interpolation while double-quoted does both.
Escape code example:
2.4.0 :004 > puts 'Hello \n World'
Hello \n World
2.4.0 :005 > puts "Hello \n World"
Hello
World
Interpolation...
Getting rid of all the rounded corners in Twitter Bootstrap
...such as enabling or disabling flex gird system, rounded corners, gradients etc. :
$enable-flex: false !default;
$enable-rounded: true !default; // <-- This one
$enable-shadows: false !default;
$enable-gradients: false !default;
$enable-transitions: false !default;
Ro...
What is the difference between Python and IPython?
...ebook. You can put all your work into a notebook like script, image files, etc. But with base Python, you can only make the script in a file and execute it.
At start, you need to understand that the IPython is developed with the intention of supporting rich media and Python script in a single integ...