大约有 40,000 项符合查询结果（耗时：0.0315秒） [XML]
finding and replacing elements in a list
...,4,5,1,2,3,4,5,1,12]
for i in range (len(a)):
if a[i]==2:
a[i]=123
You can use a for and or while loop; however if u know the builtin Enumerate function, then it is recommended to use Enumerate.1
share
...
Runnable with a parameter?
...
@kape123 The answer is "it depends". As long as a Runnable object returned by the method exists anywhere, the paramStr will probably not be eligible for garbage collection. It is possible that if the object exists but can never be...
JavaScript file upload size validation
...
123
Using jquery:
<form action="upload" enctype="multipart/form-data" method="post">
U...
How to change or add theme to Android Studio?
...
123
//you need to go to the File-> settings
in that choose IDE settings-> Appearance in tha...
How to automatically add user account AND password with a Bash script?
...
123
You can run the passwd command and send it piped input. So, do something like:
echo thePassw...
How to round float numbers in javascript?
...
Number((456.1235).toFixed(3)) -> 456.123, Number((1.235).toFixed(2)) -> 1.24... Stupid JavaSript...
– NoOne
Jun 21 '15 at 9:31
...
Remove duplicated rows
...for larger data sets
library(microbenchmark)
library(data.table)
set.seed(123)
DF <- as.data.frame(matrix(sample(1e8, 1e5, replace = TRUE), ncol = 10))
DT <- copy(DF)
setDT(DT)
microbenchmark(unique(DF), unique(DT))
# Unit: microseconds
# expr min lq mean median ...
Convert javascript array to string
...
123
Converting From Array to String is So Easy !
var A = ['Sunday','Monday','Tuesday','Wednesday'...
Canvas is stretched when using CSS but normal with “width” / “height” properties
...t answer, but don't forget to add the canvasObject.setAttribute('height', '123') too!
– Tom Wells
Mar 15 '13 at 14:46
...
Statistics: combinations in Python
...
123
See scipy.special.comb (scipy.misc.comb in older versions of scipy). When exact is False, it u...