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sed: print only matching group
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Match the whole line, so add a .* at the beginning of your regex. This causes the entire line ...
How can I detect if the user is on localhost in PHP?
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You can also use $_SERVER['REMOTE_ADDR'] for which IP address of the client requesting is give...
Add zero-padding to a string
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301
You can use PadLeft
var newString = Your_String.PadLeft(4, '0');
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Cost of len() function
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It's O(1) (constant time, not depending of actual length of the element - very fast) on every type you've mentioned, plus set and others such as array.array.
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Can I specify multiple users for myself in .gitconfig?
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You can configure an individual repo to use a specific user / email address which overrides t...
Can someone give an example of cosine similarity, in a very simple, graphical way?
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10 Answers
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Active
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Numpy index slice without losing dimension information
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It's probably easiest to do x[None, 10, :] or equivalently (but more readable) x[np.newaxis, 10, :].
As far as why it's not the default, personally, I find that constantly having arrays with singleton dimensions gets annoying very quickly. I'd guess the nump...
Slicing of a NumPy 2d array, or how do I extract an mxm submatrix from an nxn array (n>m)?
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As Sven mentioned, x[[[0],[2]],[1,3]] will give back the 0 and 2 rows that match with the 1 and 3 columns while x[[0,2],[1,3]] will return the values x[0,1] and x[2,3] in an array.
There is a helpful function for doing the first example I gave, numpy.ix_....
How can I apply a function to every row/column of a matrix in MATLAB?
...an apply a function to every item in a vector by saying, for example, v + 1 , or you can use the function arrayfun . How can I do it for every row/column of a matrix without using a for loop?
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