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Mechanisms for tracking DB schema changes [closed]
...a database-specific flavour of SQL. Your Ruby migration code ends up being converted into the DDL specific to your current database; this makes switching database platforms very easy.
For every change you make to the database, you write a new migration. Migrations typically have two methods: an "u...
jQuery selector for the label of a checkbox
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Use .text() to convert object to string: alert($("label[for='comedyclubs']").text());
– Loren
Dec 12 '12 at 18:56
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How to negate the whole regex?
...d Lookbehind Zero-Width Assertions
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How do I convert CamelCase into human-readable names in Java?
Regex for all strings not containing a string?
A regex to match a substring that isn’t followed by a certain other substring.
More examples
These are attempts to come ...
Getting “A potentially dangerous Request.Path value was detected from the client (&)”
... This solution can give you this error: HTTP Error 500.19 - Internal Server Error The requested page cannot be accessed because the related configuration data for the page is invalid.
– Tom Stickel
Aug 17 '15 at 23:30
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What is the proper way to check if a string is empty in Perl?
...== and != operators are numeric comparison operators. They will attempt to convert both operands to integers before comparing them.
See the perlop man page for more information.
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How to combine two or more querysets in a Django view?
...ne, since itertools is implemented in C. It also consumes less memory than converting each queryset into a list before concatenating.
Now it's possible to sort the resulting list e.g. by date (as requested in hasen j's comment to another answer). The sorted() function conveniently accepts a generat...
PHP + curl, HTTP POST sample code?
...ooking again at this answer, you can also replace your custom query string converter implementation with http_build_query, just give it the $fields array and it'll output a query string.
– user2629998
Nov 17 '14 at 11:54
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How to construct a set out of list items in python?
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Just note that the order of the elements in a list is generally lost when converting the list to a set since a set is inherently unordered. (One exception in CPython, though, seems to be if the list consists only of non-negative integers, but I assume this is a consequence of the implementation of ...
return query based on date
...we do it all in one shot: new Date(new Date().getTime()-60*5*1000)
...then convert to ISO string: .toISOString()
new Date(new Date().getTime()-60*5*1000).toISOString() gives us 2017-01-14T08:53:17.586Z
Of course this is a little easier with variables if you're using the node-mongodb-native driver,...
“Undefined reference to” template class constructor [duplicate]
...ile for every type in order to ensure this problem never happens! (cola<int>, cola<char>, cola<ostream>, cola< cola<int> > ... and so on ...)
The two answers are:
Tell the compiler, at the end of cola.cpp, which particular template classes will be required, forcing i...