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App Inventor 2 ECharts 拓展：基于 ECharts 强大的个性化数据图表展示 · ...
...进行展示的图表拓展，基于ECharts强大的js图表库开发。v2.0 起内置：柱状图、折线图、饼图、仪表图、条形图、堆叠柱状图、面积图、堆叠面积图、环形图、玫瑰图、漏斗图、散点图、气泡图、雷达图、热力图、K线图、进度环、...
Where is the syntax for TypeScript comments documented?
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edited Apr 27 '19 at 14:07
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Converting string from snake_case to CamelCase in Ruby
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10 Answers
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Base64 encoding and decoding in client-side Javascript
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Some browsers such as Firefox, Chrome, Safari, Opera and IE10+ can handle Base64 natively. Take a look at this Stackoverflow question. It's using btoa() and atob() functions.
For server-side JavaScript (Node), you can use Buffers to decode.
If you are going for a cross-browser solut...
Practical usage of setjmp and longjmp in C
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int r ;
printf("(A1)\n");
r = setjmp(bufferA);
if (r == 0) routineB();
printf("(A2) r=%d\n",r);
r = setjmp(bufferA);
if (r == 0) longjmp(bufferB, 20001);
printf("(A3) r=%d\n",r);
r = setjmp(bufferA);
if (r == 0) longjmp(bufferB, 20002);
printf("(A4...
How to convert a number to string and vice versa in C++
...g to numeric
float stof(const string& str, size_t *idx = 0);
double stod(const string& str, size_t *idx = 0);
long double stold(const string& str, size_t *idx = 0);
int stoi(const string& str, size_t *idx = 0, int base = 10);
long ...
Immutable vs Mutable types
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What? Floats are immutable? But can't I do
x = 5.0
x += 7.0
print x # 12.0
Doesn't that "mut" x?
Well you agree strings are immutable right? But you can do the same thing.
s = 'foo'
s += 'bar'
print s # foobar
The value of the variable changes, but it changes by chang...
How can javascript upload a blob?
...?
– William Entriken
Aug 7 '13 at 2:05
@FullDecent What do you mean? To prompt the user to download a file using the F...
JoeDevCamera 扩展：在布局中显示相机预览，程序控制拍照与录像 · App Inventor 2 中文网
...应用。
下载
joejsanz.joedevcamera.aix（v1.0）
Camera.aia - 原作者示例项目
基本信息
版本：v1.0（本站分发版本）
发布时间：2025-09-04
JDK：11
最低 API 级别：21
构建方式：FAST-CLI v4.3.1
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How to get a substring of text?
I have text with length ~700. How do I get only ~30 of its first characters?
5 Answers
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