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Test if lists share any items in python
...imeit
>>> timeit('bool(set(a) & set(b))', setup="a=list(range(1000));b=list(range(1000))", number=100000)
26.077727576019242
>>> timeit('any(i in a for i in b)', setup="a=list(range(1000));b=list(range(1000))", number=100000)
0.16220548999262974
Here's a graph of the executio...
Getting Java version at runtime
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answered Apr 7 '10 at 9:08
polygenelubricantspolygenelubricants
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How do I lowercase a string in C?
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answered Apr 18 '10 at 9:44
EarlzEarlz
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`elif` in list comprehension conditionals
...owLowRepImageUploadWarning: true,
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C char array initialization
...t how you initialize an array, but for:
The first declaration:
char buf[10] = "";
is equivalent to
char buf[10] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
The second declaration:
char buf[10] = " ";
is equivalent to
char buf[10] = {' ', 0, 0, 0, 0, 0, 0, 0, 0, 0};
The third declaration:
char buf...
Is there a simple way to delete a list element by value?
...ces of your element. Use a list comprehension for that.
>>> a = [10, 20, 30, 40, 20, 30, 40, 20, 70, 20]
>>> a = [x for x in a if x != 20]
>>> print(a)
[10, 30, 40, 30, 40, 70]
share
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Bash conditionals: how to “and” expressions? (if [ ! -z $VAR && -e $VAR ])
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10
This solution works even in strictly POSIX-compliant shells and therefore also in bash; however, to take full advantage of "bashisms", see ...
Change Placeholder Text using jQuery
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Neshat KhanNeshat Khan
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MySQL: Insert record if not exists in table
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+----+--------+-----------+------+
And so on...
Update:
To prevent #1060 - Duplicate column name error in case two values may equal, you must name the columns of the inner SELECT:
INSERT INTO table_listnames (name, address, tele)
SELECT * FROM (SELECT 'Unknown' AS name, 'Unknown' AS address,...
handlerbars.js check if list is empty
... DrejcDrejc
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