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Clean ways to write multiple 'for' loops
...r
{
template <typename C>
constexpr static std::true_type test(typename C::iterator *);
template <typename>
constexpr static std::false_type test(...);
constexpr static bool value = std::is_same<
std::true_type, decltype(test<typename std::remov...
How do I convert NSMutableArray to NSArray?
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@durazno It is not wrong. Double check your test. If [mutableArray copy] is returning an empty array, then mutableArray must have been an empty array. My answer only applies when mutableArray is nil.
– Richard Venable
Jul 22 '16 a...
How to get size of mysql database?
...ult
Database Size (MB)
db1 11.75678253
db2 9.53125000
test 50.78547382
Get result in GB
SELECT table_schema AS "Database", SUM(data_length + index_length) / 1024 / 1024 / 1024 AS "Size (GB)" FROM information_schema.TABLES GROUP BY table_schema
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Remove substring from the string
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If you are using Rails there's also remove.
E.g. "Testmessage".remove("message") yields "Test".
Warning: this method removes all occurrences
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Count how many files in directory PHP
...
Since I needed this too, I was curious as to which alternative was the fastest.
I found that -- if all you want is a file count -- Baba's solution is a lot faster than the others. I was quite surprised.
Try it out for yourself:
<?php
define('MYDIR', '...');
foreach (array(1, 2, 3) as $i)
{
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CoffeeScript, When to use fat arrow (=>) over arrow (->) and vice versa
...xample for unstanding the fat arrow
not works: (@canvas undefined)
class Test
constructor: ->
@canvas = document.createElement 'canvas'
window.addEventListener 'resize', ->
@canvas.width = window.innerWidth
@canvas.height = window.innerHeight
works: (@canvas defined)
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Creating an empty Pandas DataFrame, then filling it?
...as a new feature in 0.8.0, I would definitely recommend upgrading to the latest stable release (0.9.1) there are many bug fixes and new features. :)
– Andy Hayden
Dec 15 '12 at 9:52
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How do you divide each element in a list by an int?
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@Casa: Someone tested this at stackoverflow.com/q/1247490 . The conclusion seems to be that list comprehensions win, in this particular case.
– Brian
Nov 23 '11 at 16:15
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How to convert hex to rgb using Java?
... well, note that in the 3 character case each value must be * 255 / 16. I tested this with "000", "aaa", and "fff", and they all work properly now.
– Andrew
Apr 14 '16 at 16:04
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How can I comment a single line in XML?
... far that breaks is the one in .NET, specifically C#. So, be sure to first test that your tools, IDE, libraries, language, etc. accept it before using it.
If you care about SGML compatibility, simply use this instead:
<!-- -
<XmlTag variable="0" />
<!- -->
Add '->' to the top c...