大约有 16,000 项符合查询结果（耗时：0.0236秒） [XML]
Measuring function execution time in R
...
Another possible way of doing this would be to use Sys.time():
start.time <- Sys.time()
...Relevent codes...
end.time <- Sys.time()
time.taken <- end.time - start.time
time.taken
Not the most elegant way to do it, compared to the answere above , but definitely a w...
Using the rJava package on Win7 64 bit with R
...(at least for me). You can check easily within R is JAVA_HOME is set with
Sys.getenv("JAVA_HOME")
If you need to have JAVA_HOME set (e.g. you need it for maven or something else), you could deactivate it within your R-session with the following code before loading rJava:
if (Sys.getenv("JAVA_HO...
How can I convert String to Int?
I have a TextBoxD1.Text and I want to convert it to an int to store it in a database.
30 Answers
...
An efficient way to transpose a file in Bash
...
$ time perl test.pl file >/dev/null
real 0m0.480s
user 0m0.442s
sys 0m0.026s
$ time awk -f test.awk file >/dev/null
real 0m0.382s
user 0m0.367s
sys 0m0.011s
$ time perl test.pl file >/dev/null
real 0m0.481s
user 0m0.431s
sys 0m0.022s
$ time awk -f test.a...
Convert int to string?
How can I convert an int datatype into a string datatype in C#?
11 Answers
11
...
How to fix “ImportError: No module named …” error in Python?
...
Python does not add the current directory to sys.path, but rather the directory that the script is in. Add /home/bodacydo/work/project to either sys.path or $PYTHONPATH.
share
|
...
Signed to unsigned conversion in C - is it always safe?
...
Short Answer
Your i will be converted to an unsigned integer by adding UINT_MAX + 1, then the addition will be carried out with the unsigned values, resulting in a large result (depending on the values of u and i).
Long Answer
According to the C99 Sta...
How to convert int to char with leading zeros?
I need to convert int datafield to nvarchar with leading zeros
17 Answers
17
...
Efficiently convert rows to columns in sql server
I'm looking for an efficient way to convert rows to columns in SQL server, I heard that PIVOT is not very fast, and I need to deal with lot of records.
...
Convert Int to String in Swift
...
Converting Int to String:
let x : Int = 42
var myString = String(x)
And the other way around - converting String to Int:
let myString : String = "42"
let x: Int? = myString.toInt()
if (x != nil) {
// Successfully con...