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sed or awk: delete n lines following a pattern
How would I mix patterns and numeric ranges in sed (or any similar tool - awk for example)? What I want to do is match certain lines in a file, and delete the next n lines before proceeding, and I want to do that as part of a pipeline.
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Generate random integers between 0 and 9
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Try:
from random import randrange
print(randrange(10))
Docs: https://docs.python.org/3/library/random.html#random.randrange
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Return empty cell from formula in Excel
...'re going to have to use VBA, then. You'll iterate over the cells in your range, test the condition, and delete the contents if they match.
Something like:
For Each cell in SomeRange
If (cell.value = SomeTest) Then cell.ClearContents
Next
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Replace values in list using Python [duplicate]
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Here's another way:
>>> L = range (11)
>>> map(lambda x: x if x%2 else None, L)
[None, 1, None, 3, None, 5, None, 7, None, 9, None]
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Any reason not to use '+' to concatenate two strings?
...B','C','D','E','F']
>>> myl2=[chr(random.randint(65,90)) for i in range(0,10000)]
Lets create two functions, UseJoin and UsePlus to use the respective join and + functionality.
>>> def UsePlus():
return [myl[i] + myl[i + 1] for i in range(0,len(myl), 2)]
>>> def Us...
Are list-comprehensions and functional functions faster than “for loops”?
...ode-level loop:
>>> dis.dis(<the code object for `[x for x in range(10)]`>)
1 0 BUILD_LIST 0
3 LOAD_FAST 0 (.0)
>> 6 FOR_ITER 12 (to 21)
9 STORE_FAST 1 (x)
12 LO...
Difference between del, remove and pop on lists
...n>", line 1, in <module>
IndexError: list assignment index out of range
>>> a.pop(7)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
IndexError: pop index out of range
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HTTP status code for a partial successful request
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What about using 206 Partial Content. I know 206 is more about ranges, but what if it could indicate a partially successfully request?
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How can I recover the return value of a function passed to multiprocessing.Process?
...sing.Manager()
return_dict = manager.dict()
jobs = []
for i in range(5):
p = multiprocessing.Process(target=worker, args=(i,return_dict))
jobs.append(p)
p.start()
for proc in jobs:
proc.join()
print return_dict.values()
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How to retrieve all keys (or values) from a std::map and put them into a vector?
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There is a boost range adaptor for this purpose:
#include <boost/range/adaptor/map.hpp>
#include <boost/range/algorithm/copy.hpp>
vector<int> keys;
boost::copy(m | boost::adaptors::map_keys, std::back_inserter(keys));
There...