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The role of #ifdef and #ifndef
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131
Text inside an ifdef/endif or ifndef/endif pair will be left in or removed by the pre-processor...
Python Mocking a function from an imported module
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answered Apr 21 '13 at 18:35
Matti JohnMatti John
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If table exists drop table then create it, if it does not exist just create it
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312
Just put DROP TABLE IF EXISTS `tablename`; before your CREATE TABLE statement.
That statement...
django admin - add custom form fields that are not part of the model
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edited Aug 23 '18 at 15:34
Adrian Martin
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classical inheritance vs prototypal inheritance in javascript
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3 Answers
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Is it possible to make a type only movable and not copyable?
...ess you explicitly implement it for your type:
struct Triplet {
one: i32,
two: i32,
three: i32
}
impl Copy for Triplet {} // add this for copy, leave it out for move
The implementation can only exist if every type contained in the new struct or enum is itself Copy. If not, the compile...
How to add leading zeros for for-loop in shell? [duplicate]
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Use the following syntax:
$ for i in {01..05}; do echo "$i"; done
01
02
03
04
05
Disclaimer: Leading zeros only work in >=bash-4.
If you want to use printf, nothing prevents you from putting its result in a variable for further use:
$ foo=$(printf "%02d" 5)
$ echo "${foo}"
05
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How do you get AngularJS to bind to the title attribute of an A tag?
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answered Aug 21 '13 at 0:15
Nhat NguyenNhat Nguyen
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How to re-open an issue in github?
...nce the old one (by mentioning its number preceded by a hash sign, e.g. #123).
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Trigger change() event when setting 's value with val() function
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edited Apr 30 '15 at 9:12
Christos
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