大约有 47,000 项符合查询结果（耗时：0.0514秒） [XML]
How to get device make and model on iOS?
...ing if it's possible to detect/know if I have an iPhone 3GS vs. and iPhone 4 vs. an iPhone 4S (in actuality, all I really want to do is determine if I have a 3G or not, because I'm doing fairly graphics intensive stuff) .
...
Extract elements of list at odd positions
... second at 1 etc.):
1, 3, 5
so the result (actual numbers) will be:
2, 4, 6
Explanation
The [1::2] at the end is just a notation for list slicing. Usually it is in the following form:
some_list[start:stop:step]
If we omitted start, the default (0) would be used. So the first element (at po...
PHP: merge two arrays while keeping keys instead of reindexing?
...
564
You can simply 'add' the arrays:
>> $a = array(1, 2, 3);
array (
0 => 1,
1 => 2...
Backporting Python 3 open(encoding=“utf-8”) to Python 2
...tions.html#open.
– pmdarrow
Oct 9 '14 at 18:34
7
...
Select multiple columns in data.table by their numeric indices
... Henrik
52.1k1111 gold badges117117 silver badges134134 bronze badges
answered Nov 14 '12 at 17:28
Josh O'BrienJosh O'Brien
144k2...
Difference between '..' (double-dot) and '…' (triple-dot) in range generation?
...e?(5) #=> true
(1...5).include?(5) #=> false
(1..4).include?(4.1) #=> false
(1...5).include?(4.1) #=> true
(1..4).to_a == (1...5).to_a #=> true
(1..4) == (1...5) #=> false
†The docs used to not include this, instead requiring read...
How to split a sequence into two pieces by predicate?
...
By using partition method:
scala> List(1,2,3,4).partition(x => x % 2 == 0)
res0: (List[Int], List[Int]) = (List(2, 4),List(1, 3))
share
|
improve this answer
...
How to add new item to hash
...
pjumblepjumble
16k66 gold badges4040 silver badges5050 bronze badges
7
...
How do I sort one vector based on values of another
...
answered Oct 14 '09 at 21:47
Ian FellowsIan Fellows
16k1010 gold badges4444 silver badges6363 bronze badges
...
MySQL: What's the difference between float and double?
...
answered Jan 29 '10 at 9:04
Daniel VassalloDaniel Vassallo
301k6666 gold badges475475 silver badges424424 bronze badges
...