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Create an index on a huge MySQL production table without table locking
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134
[2017] Update: MySQL 5.6 has support for online index updates
https://dev.mysql.com/doc/refman...
Semi-transparent color layer over background-image?
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234
Here it is:
.background {
background:url('../img/bg/diagonalnoise.png');
position: rel...
Format date and time in a Windows batch script
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33 Answers
33
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Declaring variables inside or outside of a loop
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edited Aug 6 '17 at 13:35
answered Jan 10 '12 at 13:12
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How to index into a dictionary?
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Dictionaries are unordered in Python versions up to and including Python 3.6. If you do not care about the order of the entries and want to access the keys or values by index anyway, you can use d.keys()[i] and d.values()[i] or d.items()[i]. (Note that these methods create a list of all keys, va...
How to add an empty column to a dataframe?
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463
If I understand correctly, assignment should fill:
>>> import numpy as np
>>>...
How to determine if a list of polygon points are in clockwise order?
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23 Answers
23
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What is a 'semantic predicate' in ANTLR?
... of semantic predicates in Antlr4
Semantic predicates in ANTLR4?
ANTLR 3
A semantic predicate is a way to enforce extra (semantic) rules upon grammar
actions using plain code.
There are 3 types of semantic predicates:
validating semantic predicates;
gated semantic predicates;
disambiguating...
How to validate date with format “mm/dd/yyyy” in JavaScript?
... // Check the ranges of month and year
if(year < 1000 || year > 3000 || month == 0 || month > 12)
return false;
var monthLength = [ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ];
// Adjust for leap years
if(year % 400 == 0 || (year % 100 != 0 && year % ...
No module named setuptools
...ific system.
– rob
May 2 '16 at 19:53
25
Debian/ubuntu: apt-get install -y python-setuptools
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