大约有 7,000 项符合查询结果（耗时：0.0173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...
Are static class variables possible in Python?
...gt;> X.bar = 0
>>> x = X()
>>> x.bar
0
>>> x.foo
Traceback (most recent call last):
File "<interactive input>", line 1, in <module>
AttributeError: X instance has no attribute 'foo'
>>> X.foo = 1
>>> x.foo
1
And class instances can chan...
python: Change the scripts working directory to the script's own directory
...o so that opening relative paths will work:
import os
os.chdir("/home/udi/foo")
However, you asked how to change into whatever directory your Python script is located, even if you don't know what directory that will be when you're writing your script. To do this, you can use the os.path function...
When to wrap quotes around a shell variable?
...rm token splitting and/or wildcard expansion.
Token splitting;
$ words="foo bar baz"
$ for word in $words; do
> echo "$word"
> done
foo
bar
baz
By contrast:
$ for word in "$words"; do echo "$word"; done
foo bar baz
(The loop only runs once, over the single, quoted string.)
...
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
...
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...
Check if property has attribute
...ass Library PCL (like me), then here is how you can do it :)
public class Foo
{
public string A {get;set;}
[Special]
public string B {get;set;}
}
var type = typeof(Foo);
var specialProperties = type.GetRuntimeProperties()
.Where(pi => pi.PropertyType == typeof (string)
...