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In-place type conversion of a NumPy array
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Note for those (like me) that want conversion between dtype of different byte-size (e.g. 32 to 16 bits): This method fails because y.size <> x.size. Logical once you think about it :-(
– Juh_
Jun 12 '1...
Find the index of a dict within a list, by matching the dict's value
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tom_index = next((index for (index, d) in enumerate(lst) if d["name"] == "Tom"), None)
# 1
If you need to fetch repeatedly from name, you should index them by name (using a dictionary), this way get operations would be O(1) time. An idea:
def build_dict(seq, key):
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How can I create directories recursively? [duplicate]
Is there a Python method to create directories recursively? I have this path:
5 Answers
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Passing arguments with spaces between (bash) script
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$*, unquoted, expands to two words. You need to quote it so that someApp receives a single argument.
someApp "$*"
It's possible that you want to use $@ instead, so that someApp would receive two arguments if you were to call b.sh as
b.sh 'My first' 'My second'
With someApp "$*", someAp...
How to Set AllowOverride all
... rewrite, then it worked. On Ubuntu 14.04 LTS. Hope it will be useful to some one.
– Jonauz
Jun 20 '14 at 1:26
2
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How to generate a random string in Ruby
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(0...8).map { (65 + rand(26)).chr }.join
I spend too much time golfing.
(0...50).map { ('a'..'z').to_a[rand(26)] }.join
And a last one that's even more confusing, but more flexible and wastes fewer cycles:
o = [('a'..'z'), ('A'..'Z')].map(&:to_a).flatten
string = (0...50).map ...
Changing one character in a string
...ose looking for speed/efficiency, read this
– AneesAhmed777
Apr 19 '17 at 20:27
6
"Don't modify s...
how to concatenate two dictionaries to create a new one in Python? [duplicate]
...: concatenate the items and call dict on the resulting list:
$ python -mtimeit -s'd1={1:2,3:4}; d2={5:6,7:9}; d3={10:8,13:22}' \
'd4 = dict(d1.items() + d2.items() + d3.items())'
100000 loops, best of 3: 4.93 usec per loop
Fastest: exploit the dict constructor to the hilt, then one update:
$ pyt...
Why do we need break after case statements?
Why doesn't the compiler automatically put break statements after each code block in the switch? Is it for historical reasons? When would you want multiple code blocks to execute?
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jQuery get the location of an element relative to window
Given an HTML DOM ID, how to get an element's position relative to the window in JavaScript/JQuery? This is not the same as relative to the document nor offset parent since the element may be inside an iframe or some other elements. I need to get the screen location of the element's rectangle (as ...