大约有 45,000 项符合查询结果（耗时：0.0462秒） [XML]
Is there a null-coalescing (Elvis) operator or safe navigation operator in javascript?
..."Anonymous" .
But Javascript currently doesn't have the other functionality. I'd recommend looking at CoffeeScript if you want an alternative syntax. It has some shorthand that is similar to what you are looking for.
For example The Existential Operator
zip = lottery.drawWinner?().address?.zi...
glVertexAttribPointer clarification
...ust want to make sure I understand this correctly (I'd ask on SO Chat, but it's dead in there!):
2 Answers
...
Why is the default value of the string type null instead of an empty string?
It's quite annoying to test all my strings for null before I can safely apply methods like ToUpper() , StartWith() etc...
...
When would I use XML instead of SQL? [closed]
...is has led me to think about the usage of XML/XSLT in general and in what situations it would be more useful than the approach I've always used, which is storing all of my data in a (My)SQL database and then using PHP/Python/etc. to work with it on the web as needed.
...
Container-fluid vs .container
...he viewport that the webpage is being viewed on, the container class gives its div a specific fixed width. These lines don't exist in any form for container-fluid, so its width changes every time the viewport width changes.
So for example, say your browser window is 1000px wide. As it's greater tha...
How to install MySQLdb (Python data access library to MySQL) on Mac OS X?
...d the universe according to google includes numerous references to what a PITA it is, and an inordinate number of guides that seem to be outdated. Given that this site is intended to address these sorts of problems, and I know that I'm going to need a reference to the solution in future, I'm going ...
Using ZXing to create an Android barcode scanning app [duplicate]
...);
intent.putExtra("SCAN_MODE", "QR_CODE_MODE");
startActivityForResult(intent, 0);
}
};
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == 0) {
if (resultCode == RESULT_OK) {
String contents = intent.getStri...
How to prevent Node.js from exiting while waiting for a callback?
...re empty. A callback is added to an event queue when a call such as
emmiter1.on('this_event',callback).
has executed. This call is part of the code written by the module developer .
If a module is a quick port from a synchronous/blocking version, this may not happen til some part of the oper...
Can I call a base class's virtual function if I'm overriding it?
...
Is there any possible issues with doing this? Is it bad practice?
– Robben_Ford_Fan_boy
Feb 2 '11 at 15:01
37
...
How can you find the height of text on an HTML canvas?
...has a context.measureText(text) function that will tell you how much width it would require to print that text, but I can't find a way to find out how tall it is. I know it's based on the font, but I don't know to convert a font string to a text height.
...