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AppInventor如何选相反数? - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

问:AppInventor如何选相反数? 答:使用“数学”中的“相反数”积木: 返回给定数字的负数,若给定负数则返回正数。如:8 返回 -8,-0.7 返回 0.7,0 则仍然返回 0。 文档:https://www.fun123.cn/reference/blocks/math.html#neg
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App Inventor 2 代码调试方式:App调试、问题排查方法 · App Inventor 2 中文网

...模拟器:(手机的话,插上数据线就行了) adb connect 127.0.0.1:7555 6、输入adb devices,验证是否成功连接。 adb shell 进控制。 7、查看日志:adb logcat,执行结果参考如下: 要停止日志输出,请按Ctrl + C。 ...
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App Inventor 2 文本输入框怎么设置输入数子上下限! - App应用开发 - 清...

... 文本输入框怎么设置输入数字上下限!例如设置下限为0.1 上限99 如果下限输入小于0自动改为0.1,输入大于99自动改为99, 在下限0.1 与上限99 之间能任意输入,怎么做?目前只能点计算按钮,事件中加判断,不合适提醒并改成边界...
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BrightnessTools 拓展:设置手机亮度的工具 · App Inventor 2 中文网

... 返回哪些发生了变化。 0 = 亮度变化, 1 = 自适应变化 brightness Number (int) ...
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【二进制】UrsAI2ByteArray 字节数组扩展:读写二进制数据,二进制文件读写...

...以使用Base属性设置。可能的值为1(App Inventor中常用)或0(Java或C中常用)。组件以空数组开始,这意味着它不包含任何元素。可以使用以下方法添加元素:AddByte(无符号8位数字[0..255])AddWord(无符号16位数字[0..65,536])AddDWord...
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Difference between JSONObject and JSONArray

...adata alongside an array of the items matching your query: {"startIndex": 0, "data": [{"name":"item 1"},{"name": "item2"} ]} share | improve this answer | follow ...
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C# constructor execution order

... | edited Dec 11 '19 at 20:53 howcheng 1,46911 gold badge99 silver badges1515 bronze badges answered De...
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Detecting WPF Validation Errors

... 10 Answers 10 Active ...
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How can mixed data types (int, float, char, etc) be stored in an array?

... int ival; float fval; char cval; } val; } my_array[10]; The type member is used to hold the choice of which member of the union is should be used for each array element. So if you want to store an int in the first element, you would do: my_array[0].type = is_int; my_array[0...
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How do you send a HEAD HTTP request in Python 2?

... 104 edit: This answer works, but nowadays you should just use the requests library as mentioned by ...