大约有 41,200 项符合查询结果（耗时：0.0256秒） [XML]
Removing duplicates in lists
...ample should cover whatever you are trying to do:
>>> t = [1, 2, 3, 1, 2, 5, 6, 7, 8]
>>> t
[1, 2, 3, 1, 2, 5, 6, 7, 8]
>>> list(set(t))
[1, 2, 3, 5, 6, 7, 8]
>>> s = [1, 2, 3]
>>> list(set(t) - set(s))
[8, 5, 6, 7]
As you can see from the example resu...
jQuery map vs. each
...you can potentially waste a lot of memory.
For example:
var items = [1,2,3,4];
$.each(items, function() {
alert('this is ' + this);
});
var newItems = $.map(items, function(i) {
return i + 1;
});
// newItems is [2,3,4,5]
You can also use the map function to remove an item from an array. F...
What does the “map” method do in Ruby?
...
432
The map method takes an enumerable object and a block, and runs the block for each element, out...
Syntax for creating a two-dimensional array
...ti[0] = new int[10];
multi[1] = new int[10];
multi[2] = new int[10];
multi[3] = new int[10];
multi[4] = new int[10];
Note that every element will be initialized to the default value for int, 0, so the above are also equivalent to:
int[][] multi = new int[][]{
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
...
Dealing with multiple Python versions and PIP?
...
23 Answers
23
Active
...
Windows shell command to get the full path to the current directory?
...
369
Use cd with no arguments if you're using the shell directly, or %cd% if you want to use it in ...
Twitter bootstrap 3 two columns full height
I'm trying to make two-column full-height layout with twitter bootstrap 3. It seems that twitter bootstrap 3 does not support full height layouts.
What I want to do:
...
Could not find com.google.android.gms:play-services:3.1.59 3.2.25 4.0.30 4.1.32 4.2.40 4.2.42 4.3.23
...
|
edited Dec 3 '15 at 1:20
CJBS
12.4k55 gold badges6868 silver badges119119 bronze badges
a...
Get: TypeError: 'dict_values' object does not support indexing when using python 3.2.3 [duplicate]
...
3 Answers
3
Active
...
Why am I getting a “401 Unauthorized” error in Maven?
...
JohnJohn
6,54199 gold badges3535 silver badges9191 bronze badges
2
...