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App Inventor 2 SliderVertical 扩展：垂直的滑动条 · App Inventor 2 中文网
...不需要回复的可留空~ 请描述您的问题（300字以内）： 给个鼓励也行呐~o~ 提供截图（仅截取当前可视区域...
App Inventor 2 MultiImagePicker 拓展：实现图片/视频多选功能 - App Inve...
...帖、上传相册等场景）。MultiImagePicker 拓展完美解决这个问题。
一、拓展简介
MultiImagePicker 是 App Inventor 2 中文网提供的图片单选/多选扩展组件，主要功能：
- 支持单选和多选图片
- 支持选择视频文件
- 长按图片即可一次...
JavaScript: How to pass object by value?
...
Not really.
Depending on what you actually need, one possibility may be to set o as the prototype of a new object.
var o = {};
(function(x){
var obj = Object.create( x );
obj.foo = 'foo';
obj.bar = 'bar';
})(o);
aler...
Why does Decimal.Divide(int, int) work, but not (int / int)?
...ase-3: 0.1).
Floating-point numbers are faster to work with (in terms of CPU time; programming-wise they are equally simple) and preferred whenever you want to minimize rounding error (as in scientific applications).
shar...
Is there a library function for Root mean square error (RMSE) in python?
... for a library to calculate this for you is unnecessary over-engineering. All these metrics are a single line of python code at most 2 inches long. The three metrics rmse, mse, rmd, and rms are at their core conceptually identical.
RMSE answers the question: "How similar, on average, are the numb...
RESTful Authentication
...ZGRpbjpvcGVuIHNlc2FtZQ==
It's easy to implement, available by default on all browsers, but has some known drawbacks, like the awful authentication window displayed on the Browser, which will persist (there is no LogOut-like feature here), some server-side additional CPU consumption, and the fact t...
How to set the focus for a particular field in a Bootstrap modal, once it appears
...d be "shown.bs..." instead of "show.bs...". Show doesnt worked for me. Actually their both are working and they are different events. Sorry ignore my first sentence.
– Vladyn
Mar 15 '17 at 13:14
...
Why is 1/1/1970 the “epoch time”?
...ess than 829 days. For this reason, the time represented by the number 0 (called the epoch) had to be set in the very recent past. As this was in the early 1970s, the epoch was set to 1971-1-1.
Later, the system time was changed to increment every second, which increased the span of time that could...
How to make blinking/flashing text with CSS 3
... a bit longer than the timer (and timers aren't reliable anyway) and eventually you'll likely end up with unbounded queue of animations queued up on the element. The correct approach would be to do without the timer and "recursively" call blinker as the completion callback to the .fadeIn call.
...
How to gzip all files in all sub-directories into one compressed file in bash
This post describes how to gzip each file individually within a directory structure. However, I need to do something slightly different. I need to produce one big gzip file for all files under a certain directory. I also need to be able to specify the output filename for the compressed file (e.g., ...