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How to remove a key from a Python dictionary?
... dictionary, use the two-argument form of dict.pop():
my_dict.pop('key', None)
This will return my_dict[key] if key exists in the dictionary, and None otherwise. If the second parameter is not specified (ie. my_dict.pop('key')) and key does not exist, a KeyError is raised.
To delete a key that i...
Inserting multiple rows in a single SQL query? [duplicate]
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And please note that the maximum number of rows in one insert statement is 1000.
– cryss
Mar 21 '13 at 13:39
188
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What are the most interesting equivalences arising from the Curry-Howard Isomorphism?
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Since you explicitly asked for the most interesting and obscure ones:
You can extend C-H to many interesting logics and formulations of logics to obtain a really wide variety of correspondences. Here I've tried to focus on some of the more interesting ones rather than on the obscure, pl...
Initialization of all elements of an array to one default value in C++?
...a single call to fill_nto fill an entire 2D array. You need to loop across one dimension, while filling in the other.
– Evan Teran
Oct 3 '13 at 14:38
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Measure the time it takes to execute a t-sql query
...queries using SqlServer 2005. How can I measure how long it takes for each one to run?
6 Answers
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Microsoft CDN for jQuery or Google CDN? [closed]
...se to link to your jquery file or any javascript file for that matter. Is one potentially faster than the other? What other factors could play a role in which cdn you decide to use? I know that Microsoft, Yahoo, and Google all have CDN's now.
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jQuery Validate Required Select
...alue of the id attribute. This is a bit confusing since when working in JS one usually works with the id and not the name. See documentation here: "rules (default: rules are read from markup (classes, attributes, data)) Type: Object Key/value pairs defining custom rules. Key is the name of an elemen...
MySQL Error 1215: Cannot add foreign key constraint
...ing to use as a foreign key are primary keys in their own tables. I have done both of these things, if I'm not mistaken. Any other help you guys could offer?
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Why does Python use 'magic methods'?
I've been playing around with Python recently, and one thing I'm finding a bit odd is the extensive use of 'magic methods', e.g. to make its length available, an object implements a method, def __len__(self) , and then it is called when you write len(obj) .
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VIM Replace word with contents of paste buffer?
..., not an EX command such as :%s///g . I know that this is the typical way one replaces the word at the current cursor position: cw<text><esc> but is there a way to do this with the contents of the unnamed register as the replacement text and without overwriting the register?
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