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How does collections.defaultdict work?
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There is a great explanation of defaultdicts here: http://ludovf.net/blog/python-collections-defaultdict/
Basically, the parameters int and list are functions that you pass. Remember that Python accepts function names as arguments. int returns 0 by default and list returns a...
How to validate inputs dynamically created using ng-repeat, ng-show (angular)
...directive for this.
Here is the jsFiddle showing the usage of the ngForm: http://jsfiddle.net/pkozlowski_opensource/XK2ZT/2/
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What is the difference between sigaction and signal?
...ignals; new
applications should use sigaction()
rather than signal()
http://pubs.opengroup.org/onlinepubs/009695399/functions/signal.html#tag_03_690_07
Whether you're starting from scratch or modifying an old program, sigaction should be the right option.
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Loop through properties in JavaScript object with Lodash
...ect.options[key];
}
}
Edit: the accepted answer (_.forOwn()) should be https://stackoverflow.com/a/21311045/528262
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How exactly does a generator comprehension work?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
How to get the original value of an attribute in Rails
...previous value.
For rails 5.1+
Copied from Lucas Andrade's answer below: https://stackoverflow.com/a/50973808/9359123
Appending _was is deprecated in rails 5.1, now you should append _before_last_save
Something like:
before_save object
do_something_with object.name_before_last_save
end
W...
What is the maximum length of a table name in Oracle?
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The schema object naming rules may also be of some use:
http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/sql_elements008.htm#sthref723
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What is the maximum value for an int32?
... 3.14......86181221809936452346214748364710527835665425671614...
source: http://www.subidiom.com/pi/
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answered Oct 26 '15 at 22:19
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Count Rows in Doctrine QueryBuilder
...;getSingleScalarResult();
}
Also think about caching your query result - http://symfony.com/doc/current/reference/configuration/doctrine.html#caching-drivers
public function count()
{
$qb = $repository->createQueryBuilder('t');
return $qb
->select('count(t.id)')
->...
What is the proper way to re-throw an exception in C#? [duplicate]
...should always use "throw;" to rethrow the exceptions in .NET,
Refer this, http://weblogs.asp.net/bhouse/archive/2004/11/30/272297.aspx
Basically MSIL (CIL) has two instructions - "throw" and "rethrow" and C#'s "throw ex;" gets compiled into MSIL's "throw" and C#'s "throw;" - into MSIL "rethrow"! B...