大约有 1,240 项符合查询结果（耗时：0.0323秒） [XML]
Split comma-separated strings in a column into separate rows
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UweUwe
32k99 gold badges6969 silver badges102102 bronze badges
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Why should I use tags vs. release/beta branches for versioning?
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96
Tags are mainly used for future reference to the specific version of the project, by tagging a ...
What is the most efficient string concatenation method in python?
...gt;> x = timeit.Timer(stmt="'a' + 'b'")
>>> x.timeit()
0.039999961853027344
>>> x = timeit.Timer(stmt="''.join(['a', 'b'])")
>>> x.timeit()
0.76200008392333984
However, if you're putting together a string in a loop, you're better off using the list joining method:
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Simple way to transpose columns and rows in SQL?
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RichardTheKiwiRichardTheKiwi
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Best way to compare two complex objects
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96
Serialize both objects and compare the resulting strings
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Performance of Arrays vs. Lists
...hey all did the same work):
(edited to fix bug)
List/for: 1971ms (589725196)
Array/for: 1864ms (589725196)
List/foreach: 3054ms (589725196)
Array/foreach: 1860ms (589725196)
based on the test rig:
using System;
using System.Collections.Generic;
using System.Diagnostics;
static class Program
{
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Reference requirements.txt for the install_requires kwarg in setuptools setup.py file
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96
It can't take a file handle. The install_requires argument can only be a string or a list of st...
Difference between float and decimal data type
... example, if you take a 32-bit int you can store any number from 0 - 4,294,967,295. That will only reliably cover 999,999,999, so if you threw out 2 bits and used (1<<30 -1) you'd give up nothing. Covering all 9-digit numbers with only 4 bytes is more efficient than covering 4 digits in 32 bit...
Why does my JavaScript code receive a “No 'Access-Control-Allow-Origin' header is present on the req
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and it's not secure
– llazzaro
Dec 20 '14 at 19:25
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Master-master vs master-slave database architecture?
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While researching the various database architectures as well. I have compiled a good bit of inf...