大约有 9,600 项符合查询结果（耗时：0.0152秒） [XML]
Should I use past or present tense in git commit messages? [closed]
...only applies to a few projects which are actually distributed projects. 99.999% of Git commits will never be manually applied such a manner. In most projects, the history is a change log, which should be in the past tense.
– Matt Quigley
Apr 17 '13 at 0:27
...
How to sort a dataframe by multiple column(s)
...z, dd$b),],
times=1000
)
Median times:
dd[with(dd, order(-z, b)), ] 778
dd[order(-dd$z, dd$b),] 788
library(taRifx)
microbenchmark(sort(dd, f= ~-z+b ),times=1000)
Median time: 1,567
library(plyr)
microbenchmark(arrange(dd,desc(z),b),times=1000)
Median time: 862
library(doBy)
microbenc...
How random is JavaScript's Math.random?
... The distribution of IEE754 isn't even. Maybe you can represent 0 to 999 in increments of two and have enough precision for that so you notice an even distribution across that range if you pick number many times. 10% will be two digit and 90% three digit. When you start to hit really high numb...
Aggregate / summarize multiple variables per group (e.g. sum, mean)
....122369 -128.122613
...
23 2000 12 63.436507 449.794454
24 2001 12 999.472226 922.726589
See ?aggregate, the formula argument and the examples.
share
|
improve this answer
|
...
How to darken a background using CSS?
... on solid color backgrounds
body {
background: #131418;
color: #999;
text-align: center;
}
.mycooldiv {
width: 400px;
height: 300px;
margin: 2% auto;
border-radius: 100%;
}
.red {
background: red
}
.blue {
background: blue
}
.yellow {
background: yellow
}
...
Search for all occurrences of a string in a mysql database [duplicate]
...ta; you have no idea the row schema or table.
– ashes999
Nov 26 '10 at 19:16
4
adminer.org does a...
Case insensitive regular expression without re.compile?
... answered May 4 '12 at 7:05
aem999aem999
14.7k33 gold badges1919 silver badges1212 bronze badges
...
NPM cannot install dependencies - Attempt to unlock something which hasn't been locked
...d Sep 15 '14 at 19:22
alexoviedo999alexoviedo999
6,25311 gold badge2020 silver badges1717 bronze badges
...
How do I declare a 2d array in C++ using new?
...
778
A dynamic 2D array is basically an array of pointers to arrays. You can initialize it using a ...
Find objects between two dates MongoDB
...
arcseldonarcseldon
27.1k1414 gold badges9999 silver badges109109 bronze badges
1
...