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Associativity of “in” in Python?
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123
1 in [] in 'a' is evaluated as (1 in []) and ([] in 'a').
Since the first condition (1 in []) ...
Why is SELECT * considered harmful?
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322
There are really three major reasons:
Inefficiency in moving data to the consumer. When you...
How to list only top level directories in Python?
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130
Filter the result using os.path.isdir() (and use os.path.join() to get the real path):
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“inconsistent use of tabs and spaces in indentation”
I'm trying to create an application in Python 3.2 and I use tabs all the time for indentation, but even the editor changes some of them into spaces and then print out "inconsistent use of tabs and spaces in indentation" when I try to run the program.
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Curly braces in string in PHP
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echo "This works: {$arr['key']}";
// Works
echo "This works: {$arr[4][3]}";
// This is wrong for the same reason as $foo[bar] is wrong outside a string.
// In other words, it will still work, but only because PHP first looks for a
// constant named foo; an error of level E_NOTICE (undefined c...
Which HTML5 tag should I use to mark up an author’s name?
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edited Jun 24 '13 at 20:31
answered Sep 3 '11 at 18:28
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How to create own dynamic type or dynamic object in C#?
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answered Oct 3 '12 at 13:21
Mario SannumMario Sannum
10.6k88 gold badges3434 silver badges4545 bronze badges
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Any way to delete in vim without overwriting your last yank? [duplicate]
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13 Answers
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awk without printing newline
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awk '{sum+=$3}; END {printf "%f",sum/NR}' ${file}_${f}_v1.xls >> to-plot-p.xls
print will insert a newline by default. You dont want that to happen, hence use printf instead.
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Installing a dependency with Bower from URL and specify version
...of a package name:
bower install https://github.com/jquery/jquery.git#2.0.3
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