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MySql: Tinyint (2) vs tinyint(1) - what is the difference?
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edited Dec 2 '16 at 18:39
answered Dec 2 '16 at 18:33
Aa...
Why would anyone use set instead of unordered_set?
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3
It's ordered using std::less by default; you can override this and supply your own comparison operator. cplusplus.com/reference/set/set
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Useful code which uses reduce()? [closed]
...me a lot...
Here's some cute usages:
Flatten a list
Goal: turn [[1, 2, 3], [4, 5], [6, 7, 8]] into [1, 2, 3, 4, 5, 6, 7, 8].
reduce(list.__add__, [[1, 2, 3], [4, 5], [6, 7, 8]], [])
List of digits to a number
Goal: turn [1, 2, 3, 4, 5, 6, 7, 8] into 12345678.
Ugly, slow way:
int("".join(ma...
How to get unique values in an array
... arr.push(this[i]);
}
}
return arr;
}
var duplicates = [1, 3, 4, 2, 1, 2, 3, 8];
var uniques = duplicates.unique(); // result = [1,3,4,2,8]
console.log(uniques);
For more reliability, you can replace contains with MDN's indexOf shim and check if each element's indexOf is e...
Compare two List objects for equality, ignoring order [duplicate]
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313
If you want them to be really equal (i.e. the same items and the same number of each item), I ...
How to detect a Christmas Tree? [closed]
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+300
I have an approach which I think is interesting and a bit different from the rest. The main difference in my approach, compared to ...
Using Python 3 in virtualenv
... the default version of Python (2.7). On one project, I need to use Python 3.4.
22 Answers
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import module from string variable
...st=[''])
then i will refer to matplotlib.text.
In Python 2.7 and Python 3.1 or later, you can use importlib:
import importlib
i = importlib.import_module("matplotlib.text")
Some notes
If you're trying to import something from a sub-folder e.g. ./feature/email.py, the code will look like imp...
How to use jQuery in chrome extension?
...e this :
"background":
{
"scripts": ["thirdParty/jquery-2.0.3.js", "background.js"]
}
If you need jquery in a content_scripts, you have to add it in the manifest too:
"content_scripts":
[
{
"matches":["http://website*"],
"js":["thirdParty/jq...
How to merge dictionaries of dictionaries?
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return a
# works
print(merge({1:{"a":"A"},2:{"b":"B"}}, {2:{"c":"C"},3:{"d":"D"}}))
# has conflict
merge({1:{"a":"A"},2:{"b":"B"}}, {1:{"a":"A"},2:{"b":"C"}})
note that this mutates a - the contents of b are added to a (which is also returned). if you want to keep a you could call it like m...