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What does a double * (splat) operator do
...this code:
def foo(a, *b, **c)
[a, b, c]
end
Here's a demo:
> foo 10
=> [10, [], {}]
> foo 10, 20, 30
=> [10, [20, 30], {}]
> foo 10, 20, 30, d: 40, e: 50
=> [10, [20, 30], {:d=>40, :e=>50}]
> foo 10, d: 40, e: 50
=> [10, [], {:d=>40, :e=>50}]
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Conceptually, how does replay work in a game?
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edited Jun 17 '10 at 18:31
answered Jun 17 '10 at 18:14
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Why can't I call read() twice on an open file?
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answered Oct 11 '10 at 12:27
TimTim
5,04422 gold badges2323 silver badges3434 bronze badges
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Precedence and bitmask operations
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You are actually doing this:
var_dump(0b10 & (0b01 == 0));
var_dump(0b10 & (0b01 != 0));
Try:
var_dump((0b10 & 0b01) == 0);
var_dump((0b10 & 0b01) != 0);
share
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Fastest way to remove first char in a String
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edited Jul 11 '10 at 7:02
answered Jul 11 '10 at 6:44
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What's the difference between RANK() and DENSE_RANK() functions in oracle?
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10 Answers
10
Active
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Formatting a number with exactly two decimals in JavaScript
...hich rounds my numbers to two decimal places. But I get numbers like this: 10.8, 2.4, etc. These are not my idea of two decimal places so how I can improve the following?
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Assign one struct to another in C
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answered Feb 20 '10 at 13:41
fabrizioMfabrizioM
38.8k1515 gold badges8080 silver badges107107 bronze badges
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Can't install PIL after Mac OS X 10.9
I've just updated my Mac OS to 10.9 and I discovered that some (all?) of my Python modules are not here anymore, especially the Image one.
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What is the proper way to check if a string is empty in Perl?
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answered Jan 11 '10 at 23:20
Greg HewgillGreg Hewgill
783k167167 gold badges10841084 silver badges12221222 bronze badges
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