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Truncate a list to a given number of elements
What method truncates a list--for example to the first 100 elements--discarding the others (without iterating through individual elements)?
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In Python, what is the difference between “.append()” and “+= []”?
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12 Answers
12
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How to atomically delete keys matching a pattern using Redis
...g like this
EVAL "return redis.call('del', unpack(redis.call('keys', ARGV[1])))" 0 prefix:[YOUR_PREFIX e.g delete_me_*]
Warning: As the Redis document says, because of performance maters, keys
command should not use for regular operations in production, this
command is intended for debuggi...
python numpy ValueError: operands could not be broadcast together with shapes
In numpy, I have two "arrays", X is (m,n) and y is a vector (n,1)
6 Answers
6
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AWK: Access captured group from line pattern
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183
That was a stroll down memory lane...
I replaced awk by perl a long time ago.
Apparently the...
What is the best way to do a substring in a batch file?
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401
Well, for just getting the filename of your batch the easiest way would be to just use %~n0.
@e...
How can I catch a ctrl-c event?
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174
signal isn't the most reliable way as it differs in implementations. I would recommend using s...
Stack smashing detected
...following snippet:
#include <stdio.h>
void func()
{
char array[10];
gets(array);
}
int main(int argc, char **argv)
{
func();
}
The compiler, (in this case gcc) adds protection variables (called canaries) which have known values. An input string of size greater than 10 causes c...
Decimal separator comma (',') with numberDecimal inputType in EditText
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105
A workaround (until Google fix this bug) is to use an EditText with android:inputType="numberD...
How to break nested loops in JavaScript? [duplicate]
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15 Answers
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