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Mercurial (hg) commit only certain files
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3 Answers
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Active
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How to keep Maven profiles which are activeByDefault active even if another profile gets activated?
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Kariem
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answered Sep 20 '11 at 7:07
seanfseanf
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Why does this code using random strings print “hello world”?
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answered Mar 3 '13 at 4:40
FThompsonFThompson
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Converting an array of objects to ActiveRecord::Relation
...al data.
However, if what you want is a relation then:
for ActiveRecord 3.x, don’t call all and instead call scoped, which will give back a Relation which represents the same records that all would give you in an Array.
for ActiveRecord 4.x, simply call all, which returns a Relation.
When ...
Rails mapping array of hashes onto single hash
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163
You could compose Enumerable#reduce and Hash#merge to accomplish what you want.
input = [{"test...
Select elements by attribute in CSS
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edited Mar 26 '14 at 3:22
answered Mar 16 '11 at 11:09
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Is an array name a pointer?
..., and you can put a value in one of them with an assignment, like this:
a[3] = 9;
Here is a pointer:
int *p;
p doesn't contain any spaces for integers, but it can point to a space for an integer. We can, for example, set it to point to one of the places in the array a, such as the first one:
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Check difference in seconds between two times
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JonJon
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multiprocessing: sharing a large read-only object between processes?
...ocessing share objects created earlier in the program?"
No (python before 3.8), and Yes in 3.8 (https://docs.python.org/3/library/multiprocessing.shared_memory.html#module-multiprocessing.shared_memory)
Processes have independent memory space.
Solution 1
To make best use of a large structure wit...
How to round a number to significant figures in Python
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You can use negative numbers to round integers:
>>> round(1234, -3)
1000.0
Thus if you need only most significant digit:
>>> from math import log10, floor
>>> def round_to_1(x):
... return round(x, -int(floor(log10(abs(x)))))
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>>> round_to_1(0.0232)...