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AppInventor2 图表扩展：仪表盘、柱状图、折线图、饼图 - App Inventor 2 ...
部分效果图：
参考：https://kevinkun.cn/chart/comment-page-1#comment-27
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【转】App Inventor 2 项目中批量添加或删除文件 - App应用开发 - 清泛IT社...
...件已经没有，取代的是18个新的图片文件。
来源：https://makelog.dfrobot.com.cn/article-311822.html
怎么实现代码块 - App应用开发 - 清泛IT社区，为创新赋能！
...置图像.图片为列表中拿出的图片。可以参考这个视频：https://m.bilibili.com/video/BV1Xj41147cn
onTouchListener warning: onTouch should call View#performClick when a click is detected
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Which is faster in Python: x**.5 or math.sqrt(x)?
... (Python 2.5.2, Windows):
$ python -mtimeit -s"from math import sqrt; x = 123" "x**.5"
1000000 loops, best of 3: 0.445 usec per loop
$ python -mtimeit -s"from math import sqrt; x = 123" "sqrt(x)"
1000000 loops, best of 3: 0.574 usec per loop
$ python -mtimeit -s"import math; x = 123" "math.sqrt(x...
How to represent multiple conditions in a shell if statement?
...
Classic technique (escape metacharacters):
if [ \( "$g" -eq 1 -a "$c" = "123" \) -o \( "$g" -eq 2 -a "$c" = "456" \) ]
then echo abc
else echo efg
fi
I've enclosed the references to $g in double quotes; that's good practice, in general. Strictly, the parentheses aren't needed because the preced...
Vertical (rotated) label in Android
...fter looking around, I found yoog568's VerticalTextView class on GitHub:
https://github.com/yoog568/VerticalTextView/blob/master/src/com/yoog/widget/VerticalTextView.java
which I was able to position as desired. You also need to include the following attributes definition in your project:
https:...
php中json_decode()和json_encode()的使用方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...d"] => int(4)
["e"] => int(5)
}
$data='[
{"Name":"a1","Number":"123","Contno":"000","QQNo":""},
{"Name":"a1","Number":"123","Contno":"000","QQNo":""},
{"Name":"a1","Number":"123","Contno":"000","QQNo":""}
]';
echo json_decode($data);
结果为：
Array ( [0] => stdClass Object ( ...
Adding a regression line on a ggplot
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
How do I split a string, breaking at a particular character?
...h JavaScript’s String.prototype.split function:
var input = 'john smith~123 Street~Apt 4~New York~NY~12345';
var fields = input.split('~');
var name = fields[0];
var street = fields[1];
// etc.
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