大约有 500 项符合查询结果(耗时:0.0221秒) [XML]
How to make a great R reproducible example
...thing on larger objects, you can try
my.df2 <- data.frame(a = sample(10e6), b = sample(letters, 10e6, replace = TRUE))
If you're working with spatial data via the raster package, you can generate some random data. A lot of examples can be found in the package vignette, but here's a small nugge...
To ternary or not to ternary? [closed]
... community wiki
2 revs, 2 users 96%Ryan Delucchi
...
Floating point vs integer calculations on modern hardware
...52649
double div: 4.691226
DigitalOcean 1GB Droplet Intel(R) Xeon(R) CPU E5-2630L v2 (running trusty)
short add: 1.094323
short sub: 1.095886
short mul: 1.356369
short div: 4.256722
long add: 1.111328
long sub: 1.079420
long mul: 1.356105
long div: 7.422517
long long add: 1.057854
long long sub: ...
“21天教你学会C++” - 创意 - 清泛网 - 专注C/C++及内核技术
...e in 24 Hours》(24小时学会文法和文体)。头200本书中,有96%是计算机书籍。
结论是,要么是人们非常急于学会计算机,要么就是不知道为什么计算机惊人地简单,比任何东西都容易学会。没有一本书是要在几天里教会人们欣...
Gradle store on local file system
...rg.springframework/spring-jdbc/4.3.4.RELEASE/42175d194cf6aa7c716c0887f30255e5c0a5262c/spring-jdbc-4.3.4.RELEASE.jar
share
|
improve this answer
|
follow
|
...
What SOAP client libraries exist for Python, and where is the documentation for them? [closed]
... community wiki
2 revs, 2 users 96%sstock
...
Rendering HTML inside textarea
...
96% usage as of 2020
– ogostos
Sep 9 at 9:11
add a comment
|
...
Is it valid to replace http:// with // in a ?
... community wiki
3 revs, 2 users 96%kennytm
add a comment
|
...
How to get distinct values from an array of objects in JavaScript?
...//jsperf.com/filter-vs-dictionary-more-data When I ran this dictionary was 96% faster.
share
|
improve this answer
|
follow
|
...
How do I make a semi transparent background?
... background: url('https://images.unsplash.com/photo-1503135935062-
b7d1f5a0690f?ixlib=rb-enter code here0.3.5&ixid=eyJhcHBfaWQiOjEyMDd9&s=cf4d0c234ecaecd14f51a2343cc89b6c&dpr=1&auto=format&fit=crop&w=376&h=564&q=60&cs=tinysrgb') no-repeat;
background-...