大约有 11,400 项符合查询结果（耗时：0.0345秒） [XML]
Grouping functions (tapply, by, aggregate) and the *apply family
...
R has many *apply functions which are ably described in the help files (e.g. ?apply). There are enough of them, though, that beginning useRs may have difficulty deciding which one is appropriate for their situation or even remembering them all. They may have a gen...
Type.GetType(“namespace.a.b.ClassName”) returns null
...ce.qualified.TypeName") only works when the type is found in either mscorlib.dll or the currently executing assembly.
If neither of those things are true, you'll need an assembly-qualified name:
Type.GetType("namespace.qualified.TypeName, Assembly.Name")
...
Git workflow and rebase vs merge questions
I've been using Git now for a couple of months on a project with one other developer. I have several years of experience with SVN , so I guess I bring a lot of baggage to the relationship.
...
hexadecimal string to byte array in python
...ies of values of different types. I wish to convert this Hex String into a byte array so that I can shift each value out and convert it into its proper data type.
...
What does %w(array) mean?
...
%w(foo bar) is a shortcut for ["foo", "bar"]. Meaning it's a notation to write an array of strings separated by spaces instead of commas and without quotes around them. You can find a list of ways of writing literals in zenspider's ...
Can a variable number of arguments be passed to a function?
...
Yes. You can use *args as a non-keyword argument. You will then be able to pass any number of arguments.
def manyArgs(*arg):
print "I was called with", len(arg), "arguments:", arg
>>> manyArgs(1)
I was called with 1 arguments: (1,)
>>> manyArgs(1, 2, 3)
I was called ...
How can I print variable and string on same line in Python?
I am using python to work out how many children would be born in 5 years if a child was born every 7 seconds. The problem is on my last line. How do I get a variable to work when I'm printing text either side of it?
...
What is the difference between `let` and `var` in swift?
What is the difference between let and var in Apple's Swift language?
30 Answers
3...
How to get highcharts dates in the x axis?
...
Highcharts will automatically try to find the best format for the current zoom-range. This is done if the xAxis has the type 'datetime'. Next the unit of the current zoom is calculated, it could be one of:
second
minute
hour
day
week
month
year
This unit is then used...
receiver type *** for instance message is a forward declaration
In my iOS5 app, I have NSObject States class, and trying to init it:
9 Answers
9
...