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Ruby: How to get the first character of a string
How can I get the first character in a string using Ruby?
13 Answers
13
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Excel to CSV with UTF8 encoding [closed]
...characters with random junk characters. Tested for characters including é,è,â... Don't know if it's real UTF8 but the characters aren't mangled.
– user56reinstatemonica8
Jul 30 '13 at 16:28
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mac地址错误如何解决 - 创客硬件开发 - 清泛IT社区，为创新赋能！
我照着视频内容做的蓝牙连接模块，可是连接的时候显示蓝牙mac地址错误，换了几个不同的蓝牙设备都是这样。请教一下为什么会这样，怎么解决。连接的参数错误，要传当前的选中项目，而非全部设备的列表：
AI伴侣的权限问题 - App应用开发 - 清泛IT社区，为创新赋能！
...权限，对此查看它所有的权限，如下图，发现没有相关的蓝牙一系列权限的总开关，图里的附近设备里的选项的点进去都是一些解释，没有涉及开启的功能
我也去查看别的一些软件，如下图，它的所有权限是有个读取设备...
Mind+ 掌控板、ESP32开发板等硬件如何接入AppInventor？ - 创客硬件开发 - ...
...通信方式，及使用什么组件。一般不外乎2种方式：
1、蓝牙（经典蓝牙），使用 蓝牙客户端 组件。Mind+ 参考代码如下：
2、WIFI（TCP服务器），使用ClientSocketAI2Ext 拓展。
Resolve absolute path from relative path and/or file name
.... I'm using this techinique now, widely.
– Paulo França Lacerda
Oct 8 '18 at 2:51
1
Why is it %~...
Printing all global variables/local variables?
How can I print all global variables/local variables? Is that possible in gdb?
3 Answers
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Safe characters for friendly url [closed]
... @Skip Head, does "characters" include Latin encoded characters like ç and õ?
– Mohamad
Jun 10 '11 at 19:34
6
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SSH configuration: override the default username [closed]
...xample.org and just get rid of the HostName line.
– Lèse majesté
Jun 14 '17 at 5:21
add a c...
How do we determine the number of days for a given month in python [duplicate]
... edited Dec 2 '19 at 14:24
Gonçalo Peres 龚燿禄
2,89133 gold badges1111 silver badges2727 bronze badges
answered Feb 8 '11 at 21:06
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