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Getting root permissions on a file inside of vi? [closed]
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How to use a variable inside a regular expression?
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Specifying column name in a “references” migration
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61
Do it manually:
add_column :post, :author_id, :integer
but now, when you create the belongs_t...
What is the “-->” operator in C++?
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edited Dec 23 '18 at 15:46
community wiki
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Modifying a subset of rows in a pandas dataframe
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edited Dec 3 '18 at 6:52
answered Sep 6 '12 at 19:37
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Getting visitors country from their IP
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+1350
Try this simple PHP function.
<?php
function ip_info($ip = NULL, $purpose = "location", $deep_detect = TRUE) {
$output = N...
Why use apparently meaningless do-while and if-else statements in macros?
...e problem even harder to find, as in the following code.
if (corge)
if (1) { f(corge); g(corge); } else;
else
gralt();
The point is to use up the semicolon in contexts where a dangling semicolon is erroneous. Of course, it could (and probably should) be argued at this point that it would be ...
Differences between git remote update and fetch?
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+250
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Ioc/DI - Why do I have to reference all layers/assemblies in application's entry point?
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If I wasn't using a DI container, I wouldn't have to reference EntityFramework library in m...
Run Cron job every N minutes plus offset
...-59/20 * * * *
Explanation
An * in the minute field is the same as 0-59/1 where 0-59 is the range and 1 is the step. The command will run at the first minute in the range (0), then at all successive minutes that are distant from the first by step (1), until the last (59).
Which is why */20 * * *...