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How to delete a file or folder?
... take multiple arguments to delete multiple files, or do you call it each time for each file?
– user742864
May 9 at 23:57
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show 1 more com...
Is gettimeofday() guaranteed to be of microsecond resolution?
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Maybe. But you have bigger problems. gettimeofday() can result in incorrect timings if there are processes on your system that change the timer (ie, ntpd). On a "normal" linux, though, I believe the resolution of gettimeofday() is 10us. It can jump forward and back...
How to split csv whose columns may contain ,
... literal. I imagine that Excel implements this by going one character at a time, if it encounters a "text qualifier", it keeps going to the next "qualifier". You can probably implement this yourself with a for loop and a boolean to denote if you're inside literal text.
public string[] CsvParser(str...
Enterprise app deployment doesn't work on iOS 7.1
...ut starting to hate it nowadays.. coz of these stupid things that ruins my time...
– Karthik
Mar 16 '14 at 23:19
1
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What do *args and **kwargs mean? [duplicate]
...e_wrapper(wrapper, f) # update wrapper's metadata
return wrapper
import time
@cache
def foo(n):
time.sleep(2)
return n*2
foo(10) # first call with parameter 10, sleeps
foo(10) # returns immediately
share
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Haskell composition (.) vs F#'s pipe forward operator (|>)
...e sufficiently different as to affect this. For example, I know in F# sometimes writing
let f = exp
will not compile, and you need explicit eta-conversion:
let f x = (exp) x // or x |> exp
to make it compile. This also steers people away from points-free/compositional style, and toward...
How do I convert a datetime to date?
How do I convert a datetime.datetime object (e.g., the return value of datetime.datetime.now()) to a datetime.date object in Python?
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Code Golf: Collatz Conjecture
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}
sub Collatz_o{
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say {$null} $n;
...
}
After having run it 10 times, here is a representative sample output:
Rate Recursive Iterative Optimized
Recursive 1715/s -- -27% -46%
Iterative 2336/s 36% -- -27%
Optimized 3187/s 86% 36...
YYYY-MM-DD format date in shell script
... $date
# -1 -> explicit current date, bash >=4.3 defaults to current time if not provided
# -2 -> start time for shell
printf -v date '%(%Y-%m-%d)T\n' -1
# put current date as yyyy-mm-dd HH:MM:SS in $date
printf -v date '%(%Y-%m-%d %H:%M:%S)T\n' -1
# to print directly remove -v flag, as...
Find duplicate lines in a file and count how many time each line was duplicated?
Suppose I have a file similar to the following:
7 Answers
7
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