大约有 47,000 项符合查询结果（耗时：0.0546秒） [XML]
C# Double - ToString() formatting with two decimal places but no rounding
...
210
I use the following:
double x = Math.Truncate(myDoubleValue * 100) / 100;
For instance:
If t...
How to determine if a number is odd in JavaScript
...
360
Use the below code:
function isOdd(num) { return num % 2;}
console.log("1 is " + isOdd(1))...
Git Blame Commit Statistics
...
Update
git ls-tree -r -z --name-only HEAD -- */*.c | xargs -0 -n1 git blame \
--line-porcelain HEAD |grep "^author "|sort|uniq -c|sort -nr
I updated some things on the way.
For convenience, you can also put this into its own command:
#!/bin/bash
# save as i.e.: git-authors and s...
When should I use Lazy?
I found this article about Lazy : Laziness in C# 4.0 – Lazy
7 Answers
7
...
Selecting with complex criteria from pandas.DataFrame
...
406
Sure! Setup:
>>> import pandas as pd
>>> from random import randint
>>...
C# Regex for Guid
... you say.
resultString = Regex.Replace(subjectString,
@"(?im)^[{(]?[0-9A-F]{8}[-]?(?:[0-9A-F]{4}[-]?){3}[0-9A-F]{12}[)}]?$",
"'$0'");
This matches the following styles, which are all equivalent and acceptable formats for a GUID.
ca761232ed4211cebacd00aa0057b223
CA761232-ED42-11CE-BAC...
How to style the option of an html “select” element?
...
|
edited Sep 30 '19 at 9:58
Jay
17k3131 gold badges102102 silver badges163163 bronze badges
...
Select by partial string from a pandas DataFrame
...
Based on github issue #620, it looks like you'll soon be able to do the following:
df[df['A'].str.contains("hello")]
Update: vectorized string methods (i.e., Series.str) are available in pandas 0.8.1 and up.
...
Extract a regular expression match
...nd adds a few that are missing:
library(stringr)
str_locate("aaa12xxx", "[0-9]+")
# start end
# [1,] 4 5
str_extract("aaa12xxx", "[0-9]+")
# [1] "12"
share
|
improve this answer
...
Best way to combine two or more byte arrays in C#
...he suggested methods in a loop executed 1 million times using 3 arrays of 10 bytes each. Here are the results:
New Byte Array using System.Array.Copy - 0.2187556 seconds
New Byte Array using System.Buffer.BlockCopy - 0.1406286 seconds
IEnumerable<byte> using C# yield operator - 0....