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Why does “pip install” inside Python raise a SyntaxError?
...talled package so this is the right way of using the API: subprocess.check_call([sys.executable, '-m', 'pip', 'install', 'SomeProject']) but since Python allows to access internal API and you know what you're using the API for you may want to use internal API anyway eg. if you're building own GUI pa...
What does the comma operator , do?
...point will i have the values 5, 4, 3, 2 or 1. It is simply 0. It's practically useless unless the expressions have side effects.
– Jeff Mercado
Nov 13 '10 at 7:06
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Execute a command line binary with Node.js
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For even newer version of Node.js (v8.1.4), the events and calls are similar or identical to older versions, but it's encouraged to use the standard newer language features. Examples:
For buffered, non-stream formatted output (you get it all at once), use child_process.exec:
const ...
Applying a function to every row of a table using dplyr?
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is it possible to add the values of a dynamically formed datatframe? So in this data frame the column names are not known. I am able to add if column names are known.
– Arun Raja
May 4 '15 at 7:49
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Remove empty elements from an array in Javascript
...ill return you a new array with the elements that pass the criteria of the callback function you provide to it.
For example, if you want to remove null or undefined values:
var array = [0, 1, null, 2, "", 3, undefined, 3,,,,,, 4,, 4,, 5,, 6,,,,];
var filtered = array.filter(function (el) {...
Allowing interaction with a UIView under another UIView
... (say) which are contained in the view, do as Stuart explains. (I usually call it a "holder view" because it can harmlessly "hold" some buttons, but, it does not affect anything "below" the holder.)
– Fattie
Aug 17 '14 at 11:25
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How do I set the figure title and axes labels font size in Matplotlib?
...e different properties. In terms of the difference between the pyplot type calls and object calls (e.g. plt.xlabel() vs. ax.set_xlabel() as you say), they are equivalent, with the caveat that the plt.* functions work on the current axis/figure. So it you set up a figure with multiple axes, you'll p...
How can I troubleshoot my Perl CGI script?
...is expecting the first output from a CGI script to be the CGI header. Typically that might be as simple as print "Content-type: text/plain\n\n"; or with CGI.pm and its derivatives, print header(). Some servers are sensitive to error output (on STDERR) showing up before standard output (on STDOUT)....
JavaScript by reference vs. by value [duplicate]
... or primitive referenced by the original a is unchanged.
a = 3;
// Calling b.push changes its properties - it adds
// a new property b[b.length] with the value "foo".
// So the object referenced by b has been changed.
b.push("foo");
// The "first" property of argument c has b...
How do you get a timestamp in JavaScript?
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@Billy As I recall it, I computed the timestamp in the two suggested solutions 1M times each, and calculated the average runtime. I ran it in Firefox and Chrome, with getTime being faster in both browsers. That said, even if it were (margi...