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How to duplicate a whole line in Vim?
...urrent and next line at the beginning of the file (,+ is a synonym for the range .,.+1),
:1,t$ will copy lines from beginning till cursor position to the end (1, is a synonym for the range 1,.).
If you need to move instead of copying, use :m instead of :t.
This can be really powerful if you combi...
Loop through a date range with JavaScript
Given two Date() objects, where one is less than the other, how do I loop every day between the dates?
10 Answers
...
Function to convert column number to letter?
...
If you'd rather not use a range object:
Function ColumnLetter(ColumnNumber As Long) As String
Dim n As Long
Dim c As Byte
Dim s As String
n = ColumnNumber
Do
c = ((n - 1) Mod 26)
s = Chr(c + 65) & s
n ...
Returning the product of a list
... numexpr as ne
# from functools import reduce # python3 compatibility
a = range(1, 101)
%timeit reduce(lambda x, y: x * y, a) # (1)
%timeit reduce(mul, a) # (2)
%timeit np.prod(a) # (3)
%timeit ne.evaluate("prod(a)") # (4)
In the following configur...
Matplotlib 2 Subplots, 1 Colorbar
...5, 0.7])
fig.colorbar(im, cax=cbar_ax)
plt.show()
Note that the color range will be set by the last image plotted (that gave rise to im) even if the range of values is set by vmin and vmax. If another plot has, for example, a higher max value, points with higher values than the max of im will s...
Make column not nullable in a Laravel migration
...ering an existing table column using the schema builder. You'd need to use raw queries for this.
However, as of Laravel 5 you can use:
$table->...->nullable(false)->change();
share
|
imp...
Why does Node.js' fs.readFile() return a buffer instead of string?
...
From the docs:
If no encoding is specified, then the raw buffer is returned.
Which might explain the <Buffer ...>. Specify a valid encoding, for example utf-8, as your second parameter after the filename. Such as,
fs.readFile("test.txt", "utf8", function(err, data) {.....
How do I stop a web page from scrolling to the top when a link is clicked that triggers JavaScript?
... using addEventListener to bind your handlers, it will be an Event and the raw DOM version of .preventDefault(). Either way will do what you need.
Examples:
$('#ma_link').click(function($e) {
$e.preventDefault();
doSomething();
});
document.getElementById('#ma_link').addEventListener('cli...
Java's L number (long) specification
...teger, which is why when you type in (long) 6000000000 (not in integer's range) it will complain that 6000000000 is not an integer. To correct this, I had to specify 6000000000L . I just learned about this specification.
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Shuffling a list of objects
...where the objects are lists:
from random import shuffle
x = [[i] for i in range(10)]
shuffle(x)
# print(x) gives [[9], [2], [7], [0], [4], [5], [3], [1], [8], [6]]
# of course your results will vary
Note that shuffle works in place, and returns None.
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