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Finding duplicates in O(n) time and O(1) space
...ch step.
As we go through the array, success on the A[i] != i part of the test implies that A[i] could be a duplicate that hasn't been seen before. If we haven't seen it before, then we expect A[i]'s home location to point to itself -- that's what's tested for by the second half of the if conditio...
How to create a numpy array of all True or all False?
...en the np.full and np.ones version.
Answer: No
import timeit
n_array, n_test = 1000, 10000
setup = f"import numpy as np; n = {n_array};"
print(f"np.ones: {timeit.timeit('np.ones((n, n), dtype=bool)', number=n_test, setup=setup)}s")
print(f"np.full: {timeit.timeit('np.full((n, n), True)', number=...
Convert XLS to CSV on command line
... is not limited to xls at all. xlsx Works just fine, as we could expect.
Tested with Office 2010.
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How to “inverse match” with regex?
...e it is written in, but worked like a charm in Sublime text to clean up my test data. Thanks!
– Matthias dirickx
May 4 '17 at 11:21
1
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Using forked package import in Go
... a tiny feature to a library I am using when I ran into this headache with testing it before creating a Pull Request.
– Joakim
Jul 18 '16 at 16:20
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Is there an alternative sleep function in C to milliseconds?
... Also note that when compiling with gcc -Wall -g3 -std=c11 -o sleep_test sleep_test.c && ./sleep_test on Linux Ubuntu, with gcc version 4.8.4, I get the following warning: warning: implicit declaration of function ‘usleep’ [-Wimplicit-function-declaration]. The solution is to add ...
What does -> mean in Python function definitions?
...butes to validate called values:
def validate(func, locals):
for var, test in func.__annotations__.items():
value = locals[var]
try:
pr=test.__name__+': '+test.__docstring__
except AttributeError:
pr=test.__name__
msg = '{}=={}; Test: ...
How do I get the current line number?
...me, Path.GetFileName(fileName), lineNumber, message);
}
How to call:
void Test() {
Log("Look here!");
}
Output:
Void Test()(FILENAME.cs:104)
Look here!
Change the Console.WriteLine format how you like!
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Sleep until a specific time/date
...%86400 ))
under lighter shells like ash or dash.
Pure bash way, no fork!!
Tested under MacOS!
I wrote one two little functions: sleepUntil and sleepUntilHires
Syntax:
sleepUntil [-q] <HH[:MM[:SS]]> [more days]
-q Quiet: don't print sleep computed argument
HH Hours (minima...
How to create a file in a directory in java?
If I want to create a file in C:/a/b/test.txt , can I do something like:
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