大约有 14,600 项符合查询结果（耗时：0.0403秒） [XML]
When to use enumerateObjectsUsingBlock vs. for
...
Thanks to @bbum and @Chuck for starting comprehensive comparisons on performance. Glad to know it's trivial. I seem to have gone with:
for (... in ...) - as my default goto. More intuitive to me, more programming history here than any real preference - c...
C/C++中的段错误（Segmentation fault） - C/C++ - 清泛网 - 专注C/C++及内核技术
... = 0
(gdb) r --用r(run)运行，直到断点处
Starting program: /home/falcon/temp/segerr
Breakpoint 1, main () at segerr.c:8
8 scanf ("%d", i); --[试图往地址0处写进一个值]
(gdb) n --用n(next)执行下一步
10
...
How do you rotate a two dimensional array?
...ith both increasing and decreasing counters that represent moving inwards, starting from the outermost layer. We’ll call this our ‘layer loop’.
def rotate(matrix):
size = len(matrix)
layer_count = size / 2
for layer in range(0, layer_count):
first = layer
last = ...
Provide an image for WhatsApp link sharing
...e trick. But as soon as you use that link once, this "please note" section starts all over again.
Step 1: title
Maximum of 65 characters
<title>your keyword rich title of the website and/or webpage</title>
Step 2: description
Maximum of 155 characters
<meta name="description" conte...
Google Play Services Library update and missing symbol @integer/google_play_services_version
...iting any files, here's a couple of screenshots:
So my Project Structure started off looking like this...
Then I removed the google-play-services library from my dependencies list by selecting it and then clicking the minus button at the bottom. Notice the error at the bottom of the dialog, as m...
iPhone app signing: A valid signing identity matching this profile could not be found in your keycha
...- the main thing is you just had to delete your old provision profiles and start over.
Good Luck!
share
|
improve this answer
|
follow
|
...
Find all elements on a page whose element ID contains a certain text using jQuery
...{
//It'll be an array of elements
});
If you're finding by Starts With then it'll be like this
$("input[id^='DiscountType']").each(function (i, el) {
//It'll be an array of elements
});
If you're finding by Ends With then it'll be like this
$("input[id$='Di...
disable the swipe gesture that opens the navigation drawer in android
...oolean {
if (!isSwipeOpenEnabled && !isDrawerVisible(Gravity.START)) {
return false
}
return super.onInterceptTouchEvent(ev)
}
@SuppressLint("ClickableViewAccessibility")
override fun onTouchEvent(ev: MotionEvent): Boolean {
if (!isSwipeOpenEnabled &a...
When to use self over $this?
...
This answer would be even better if you started with a general rule rather than an exception. It's a matter of style, not of technical expertise. This is the best example I've ever seen of the difference between self:: and $this->, but it's a shame to hide that ...
Regex to match a digit two or four times
... For anyone who, like me, didn't understand the use of (?: this starts a "non-capturing group" (a group that is not intended to be referenced in a replace statement). You could also just use parens but these will create a capturing group. Further details here: stackoverflow.com/question...