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Storing R.drawable IDs in XML array
... within your /res/values folder that looks like this:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<integer-array name="random_imgs">
<item>@drawable/car_01</item>
<item>@drawable/balloon_random_02</item>
<item>@draw...
Most efficient way to make the first character of a String lower case?
... Mode Cnt Score Error Units
MyBenchmark.test1 thrpt 20 10463220.493 ± 288805.068 ops/s
MyBenchmark.test2 thrpt 20 14730158.709 ± 530444.444 ops/s
MyBenchmark.test3 thrpt 20 16079551.751 ± 56884.357 ops/s
MyBenchmark.test4 thrpt 20 9762578.446 ± 584316.582 ...
Query for array elements inside JSON type
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edited Jun 20 at 9:12
Community♦
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answered Mar 29 '14 at 22:25
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Custom Python list sorting
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60
It's documented here.
The sort() method takes optional arguments for controlling the
comp...
Express command not found
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With the release of Express 4.0.0 it looks like you need to do sudo npm install -g express-generator.
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Show an image preview before upload
... // read the image file as a data URL.
reader.readAsDataURL(this.files[0]);
};
Here's a good article on using the File APIs in JavaScript.
The code snippet in the HTML example below filters out images from the user's selection and renders selected files into multiple thumbnail previews:
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Converting a view to Bitmap without displaying it in Android?
...o. Its possible to measure it like this:
if (v.getMeasuredHeight() <= 0) {
v.measure(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
Bitmap b = Bitmap.createBitmap(v.getMeasuredWidth(), v.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
v.layout(0,...
App Inventor 2 拖拽物体教程 - 按住移动与碰撞检测 · App Inventor 2 中文网
...（更精确）
global 正在拖拽 = false
global 偏移X = 0
global 偏移Y = 0
when 画布1.Touched(x, y, touchedAnySprite) {
if touchedAnySprite {
正在拖拽 = true
偏移X = x - 图像精灵1.X
偏移Y = y - 图像精灵1.Y
}
}
when 画布1.Dragged(startX, star...
How to trim a file extension from a String in JavaScript?
...e could be any file name (Let's assume the file name only contains [a-zA-Z0-9-_] to simplify.).
23 Answers
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