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App Inventor 2 连接方式：AI伴侣、模拟器、USB · App Inventor 2 中文网
...ava写的安卓平台程序，可能未来待iOS平台成熟后，会有swift苹果版拓展。
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《App Inventor 2 连接：AI伴侣 + 模拟器 + USB（完整版）》
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《App Inventor 2 连接：AI伴侣（最推荐的测试方式）》
《App Inventor 2 ...
convert '1' to '0001' in JavaScript [duplicate]
... without using any 3rd party libraries. I have done this in php using spritf: $time = sprintf('%04.0f',$time_arr[$i]);
4 A...
Detect if an element is visible with jQuery [duplicate]
Using .fadeIn() and .fadeOut() , I have been hiding/showing an element on my page, but with two buttons, one for hide and one for show. I now want to have one button to toggle both .
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Any good boolean expression simplifiers out there? [closed]
I was refactoring old code and encountered several IF conditions that were way too complex and long and I'm certain they can be simplified. My guess is that those conditions grew so much because of later modifications.
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Load data from txt with pandas
I am loading a txt file containig a mix of float and string data. I want to store them in an array where I can access each element. Now I am just doing
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How does HTTP file upload work?
When I submit a simple form like this with a file attached:
5 Answers
5
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App Inventor 2 列表的函数式编程 · App Inventor 2 中文网
...，2）initialAnswer 和 3）组合 item（指当前列表项）和answerSoFar（指累积答案）的 body 块。
如果输入列表为空，则返回initialAnswer。 否则，answerSoFar 被初始化为initialAnswer。
首先使用answerSoFar（此时相当于initialAnswer）和第一个列表项...
9个常用iptables配置实例 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...确保旧规则被清除，用以下命令清除旧规则：
iptables -F
(or iptables --flush)
2.设置chain策略
对于filter table，默认的chain策略为ACCEPT，我们可以通过以下命令修改chain的策略：
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTP...
Run ssh and immediately execute command [duplicate]
I'm trying to find UNIX or bash command to run a command after connecting to an ssh server. For example:
3 Answers
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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 - App Invent...
...的UUID是0x180D，使用的UUID基数是：00000000-0000-1000-8000-00805F9B34FB。厂商自定义UUID：同样采用UUID基数 + 16位UUID的形式，由厂商定义，如BLE串口服务的UUID是0x001，使用的UUID基数是：6E400001-B5A3-F393-E0A9-E50E24DCCA9E。标准16位UUID技术文档请...