大约有 6,261 项符合查询结果（耗时：0.0179秒） [XML]
Convert a list to a string in C#
... separator between the substrings.
var myList = new List<String> { "foo","bar","baz"};
Console.WriteLine(String.Join("-", myList)); // prints "foo-bar-baz"
Depending on your version of .NET you might need to use ToArray() on the list first..
...
How to perform element-wise multiplication of two lists?
...
you can multiplication using lambda
foo=[1,2,3,4]
bar=[1,2,5,55]
l=map(lambda x,y:x*y,foo,bar)
share
|
improve this answer
|
follow
...
get name of a variable or parameter [duplicate]
... I would include the variable names inside the string, i.e. string.Format("foo={0}, bar={1}", foo, bar), because: in the method they are an implementation detail, but in the file they are part of the document format, which has nothing to do with what the locals are called.
– Ma...
Why are arrays of references illegal?
... Put it this way: you can have a struct of nothing but 16 refs to foo's, and use it in exactly the same way as I'd want to use my array of refs - except that you can't index into the 16 foo references. This is a language wart IMHO.
– greggo
Nov 10 '11 ...
When to use Vanilla JavaScript vs. jQuery?
...tr('id') and .id leans in favor of JS, while choosing between removeClass('foo') versus .className = .className.replace( new Regexp("(?:^|\\s+)"+foo+"(?:\\s+|$)",'g'), '' ) leans in favor of jQuery.
share
|
...
Why is parenthesis in print voluntary in Python 2.7?
...ial statement that printed all the strings if got as arguments. So print "foo","bar" simply meant "print 'foo' followed by 'bar'". The problem with that was it was tempting to act as if print were a function, and the Python grammar is ambiguous on that, since (a,b) is a tuple containing a and b bu...
Checking if a variable is not nil and not zero in ruby
...
"foo"&.nonzero? # => NoMethodError: undefined method 'nonzero?' for "foo":String .... This is not safe to use on arbitrary objects.
– Tom Lord
Jun 6 '17 at 14:38
...
Error: Jump to case label
...he initialization code belongs to another case.
In the following code, if foo equals 1, everything is ok, but if it equals 2, we'll accidentally use the i variable which does exist but probably contains garbage.
switch(foo) {
case 1:
int i = 42; // i exists all the way to the end of the swit...
How to find whether or not a variable is empty in Bash
...
if [ ${foo:+1} ]
then
echo "yes"
fi
prints yes if the variable is set. ${foo:+1} will return 1 when the variable is set, otherwise it will return empty string.
...
How to create a jQuery function (a new jQuery method or plugin)?
...ke:
$.fn.myfunction = function () {
console.log(this.length);
};
$('.foo').myfunction();
... will flush to the console the number of elements with the class foo.
Of course, there is a bit more to semantics than that (as well as best practices, and all that jazz), so make sure you read up on...