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Rounding up to next power of 2
...s there any way of achieving this without using any loops but just using some bitwise operators?
25 Answers
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Remove all occurrences of a value from a list?
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Use the list comprehension over the filter+lambda; the former is more readable in addition to generally more efficient.
– habnabit
Jul 21 '09 at 4:28
17
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PHP 5 disable strict standards error
...ng issues: serverAdmin will miss/ignore errors and log directory will consume all server space at some point.
– Lance
Jan 18 '15 at 19:44
4
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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...