大约有 25,400 项符合查询结果（耗时：0.0537秒） [XML]
json_encode sparse PHP array as JSON array, not JSON object
...uential - it has keys 0 and 2, but doesn't have 1 as a key.
Just having numeric indexes isn't enough. json_encode will only encode your PHP array as a JSON array if your PHP array is sequential - that is, if its keys are 0, 1, 2, 3, ...
You can reindex your array sequentially using the array_value...
Why does this loop produce “warning: iteration 3u invokes undefined behavior” and output more than 4
... strictly speaking, there is no such thing as "unsigned integer overflow") means undefined behaviour. And this means anything can happen, and discussing why does it happen under the rules of C++ doesn't make sense.
C++11 draft N3337: §5.4:1
If during the evaluation of an expression, the result...
Why is git push gerrit HEAD:refs/for/master used instead of git push origin master
...
The documentation for Gerrit, in particular the "Push changes" section, explains that you push to the "magical refs/for/'branch' ref using any Git client tool".
The following image is taken from the Intro to Gerrit. When you push to...
Python function global variables?
...
If you want to simply access a global variable you just use its name. However to change its value you need to use the global keyword.
E.g.
global someVar
someVar = 55
This would change the value of the global variable to 55. Otherwise it would just assign 55 to a local variable.
The or...
How to center the content inside a linear layout?
...
android:gravity handles the alignment of its children,
android:layout_gravity handles the alignment of itself.
So use one of these.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/too...
How to search and replace globally, starting from the cursor position and wrapping around the end of
...,$s/BEFORE/AFTER/gc
Then, that :substitute command is repeated with the same search
pattern, replacement string, and flags, using the :& command
(see :help :&):
1,''-&&
The latter, however, performs the substitution on the range of lines
from the first line of the file to the line...
Android: Vertical ViewPager [closed]
...
You can use a ViewPager.PageTransformer to give the illusion of a vertical ViewPager. To achieve scrolling with a vertical instead of a horizontal drag you will have to override ViewPager's default touch events and swap the coordinates of MotionEvents prior to ...
Why does Math.Round(2.5) return 2 instead of 3?
... a .NET bug. C# is the language - it doesn't decide how Math.Round is implemented.
And secondly, no - if you read the docs, you'll see that the default rounding is "round to even" (banker's rounding):
Return ValueType: System.DoubleThe integer nearest a. If the
fractional component of a is ha...
create a trusted self-signed SSL cert for localhost (for use with Express/Node)
...
The answers above were partial. I've spent so much time getting this working, it's insane. Note to my future self, here is what you need to do:
I'm working on Windows 10, with Chrome 65. Firefox is behaving nicely - just confirm localhost as a security exception and it will w...
How to create json by JavaScript for loop?
...d of your request, this should work:
<script>
// var status = document.getElementsByID("uniqueID"); // this works too
var status = document.getElementsByName("status")[0];
var jsonArr = [];
for (var i = 0; i < status.options.length; i++) {
jsonArr.push({
id: status.options[...