大约有 48,000 项符合查询结果（耗时：0.0538秒） [XML]
How can I calculate the difference between two dates?
How can I calculate the days between 1 Jan 2010 and (for example) 3 Feb 2010?
9 Answers
...
How to exit an if clause
...
(This method works for ifs, multiple nested loops and other constructs that you can't break from easily.)
Wrap the code in its own function. Instead of break, use return.
Example:
def some_function():
if condition_a:
# do something and return early
.....
Where is Android Studio layout preview?
I installed Android Studio, but when I edit my layout files, I can't find live preview! I just see an XML file. How can I see my layout in graphical view?
...
Pycharm: run only part of my Python file
... File -> Settings -> Keymap
Search for Execute Selection in Console and reassign it to a new shortcut, like Crl + Enter.
This is the same shortcut to the same action in Spyder and R-Studio.
share
|
...
How to draw polygons on an HTML5 canvas?
...
Create a path with moveTo and lineTo (live demo):
var ctx = canvas.getContext('2d');
ctx.fillStyle = '#f00';
ctx.beginPath();
ctx.moveTo(0, 0);
ctx.lineTo(100,50);
ctx.lineTo(50, 100);
ctx.lineTo(0, 90);
ctx.closePath();
ctx.fill();
...
Detecting value change of input[type=text] in jQuery
...answered Jul 20 '13 at 6:06
Alejandro SilvaAlejandro Silva
6,86011 gold badge3131 silver badges2929 bronze badges
...
Insert current date in datetime format mySQL
... But it'll use MySQL server locale/timezone. If U have Apache/PHP and MySQL on different servers and timezone set incorrect in one of them U'll have different values.
– Jeff_Alieffson
Nov 24 '13 at 17:57
...
Save modifications in place with awk
I am learning awk and I would like to know if there is an option to write changes to file, similar to sed where I would use -i option to save modifications to a file.
...
Git error when trying to push — pre-receive hook declined
When I try and push a change I've commited, I get the following error ...
27 Answers
2...
Create and append dynamically
...id='block'> you've created. You just need to create another <div> and call appendChild().
// Your existing code unmodified...
var iDiv = document.createElement('div');
iDiv.id = 'block';
iDiv.className = 'block';
document.getElementsByTagName('body')[0].appendChild(iDiv);
// Now create an...