大约有 45,000 项符合查询结果（耗时：0.0295秒） [XML]
switch() statement usage
...e) {
switch(type,
mean = 1,
median = 2,
trimmed = 3)
}
test2 <- function(type) {
if (type == "mean") 1
else if (type == "median") 2
else if (type == "trimmed") 3
}
system.time( for(i in 1:1e6) test1('mean') ) # 0.89 secs
system.time( for(i in 1:1e6) test2('mean') ) #...
Store print_r result into a variable as a string or text
...
3 Answers
3
Active
...
How can I turn off Visual Studio 2013 Preview?
...
3 Answers
3
Active
...
XPath: How to check if an attribute exists?
...
3 Answers
3
Active
...
How do I declare and assign a variable on a single line in SQL
...
3 Answers
3
Active
...
Data structure for loaded dice?
...t time) with a one-time O(n) set-up. You can find it documented in chapter 3 (PDF) of "Non-Uniform Random Variate Generation" by Luc Devroye.
The idea is to take your array of probabilities pk and produce three new n-element arrays, qk, ak, and bk. Each qk is a probability between 0 and 1, and each...
How to compile without warnings being treated as errors?
...
83
Sure, find where -Werror is set and remove that flag. Then warnings will be only warnings.
...
Execute SQLite script
I start up sqlite3 version 3.7.7, unix 11.4.2 using this command:
5 Answers
5
...
How do I reword the very first git commit message?
...
3 Answers
3
Active
...