大约有 4,768 项符合查询结果（耗时：0.0403秒） [XML]
How do you detect where two line segments intersect? [closed]
How do I determine whether or not two lines intersect, and if they do, at what x,y point?
27 Answers
...
Canvas width and height in HTML5
...="…" attributes. Set them to numeric values in JavaScript code to resize your canvas. For example:
var canvas = document.getElementsByTagName('canvas')[0];
canvas.width = 800;
canvas.height = 600;
Note that this clears the canvas, though you should follow with ctx.clearRect( 0, 0, ctx.canvas.w...
Best way to work with dates in Android SQLite [closed]
I'm having some trouble working with dates on my Android application that uses SQLite.
I have a couple questions:
9 Answers...
SVG: text inside rect
I want to display some text inside SVG rect . Is it possible?
5 Answers
5
...
Copy a variable's value into another
I have a variable which has a JSON object as its value. I directly assign this variable to some other variable so that they share the same value. This is how it works:
...
How to set default value to the input[type=“date”] [duplicate]
...
The date should take the format YYYY-MM-DD. Single digit days and months should be padded with a 0. January is 01.
From the documentation:
A string representing a date.
Value: A valid full-date as defined in [RFC 3339], with the additional qualifi...
Fast Bitmap Blur For Android SDK
Currently in an Android application that I'm developing I'm looping through the pixels of an image to blur it. This takes about 30 seconds on a 640x480 image.
...
String Concatenation using '+' operator
Looking at the string class metadata, I only see the operators == and != overloaded. So how is it able to perform concatenation for the ' + ' operator?
...
How to use a variable to specify column name in ggplot
...
You can use aes_string:
f <- function( column ) {
...
ggplot( rates.by.groups, aes_string(x="name", y="rate", colour= column,
group=column ) )
}
as long as you pass the co...
git rebase, keeping track of 'local' and 'remote'
When doing a git rebase, I often have difficulty working out what is happening with the 'local' and 'remote' when resolving conflicts. I sometimes have the impression that they swap sides from one commit to the next.
...