大约有 41,200 项符合查询结果（耗时：0.0429秒） [XML]
How to sum a variable by group
...Frequency, by=list(Category=x$Category), FUN=sum)
Category x
1 First 30
2 Second 5
3 Third 34
In the example above, multiple dimensions can be specified in the list. Multiple aggregated metrics of the same data type can be incorporated via cbind:
aggregate(cbind(x$Frequency, x$Metri...
RegEx - Match Numbers of Variable Length
...
135
{[0-9]+:[0-9]+}
try adding plus(es)
...
How to pass all arguments passed to my bash script to a function of mine? [duplicate]
...ter expands to a separate word. That is "$@" is equivalent to "$1" "$2" "$3"....
Passing some arguments:
If you want to pass all but the first arguments, you can first use shift to "consume" the first argument and then pass "$@" to pass the remaining arguments to another command. In bash (and zsh ...
Python JSON serialize a Decimal object
I have a Decimal('3.9') as part of an object, and wish to encode this to a JSON string which should look like {'x': 3.9} . I don't care about precision on the client side, so a float is fine.
...
Decreasing height of bootstrap 3.0 navbar
I am trying to decrease bootstrap 3.0 navbar height which is used with fixed top behavior. Here i am using code.
9 Answers
...
How to add multiple files to Git at the same time
...
answered Oct 24 '13 at 20:39
daxdax
9,74677 gold badges4545 silver badges7979 bronze badges
...
How to declare constant map
...
|
edited Feb 23 '17 at 22:50
Robert P
15k88 gold badges6262 silver badges110110 bronze badges
...
Escaping regex string
...
336
Use the re.escape() function for this:
4.2.3 re Module Contents
escape(string)
Retur...
Hidden Features of JavaScript? [closed]
...
1
2
3
4
Next
373
votes
...