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How to suppress warnings globally in an R Script
...lly might not be a good idea.
To turn warnings back on, use
options(warn=0)
(or whatever your default is for warn, see this answer)
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TCPClient TCP客户端扩展：连接TCP服务器进行文本消息通信 · App Inventor 2 中文网
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版本
日期
修改内容
1.0
2020-11-23
初始版本
1.1
2020-12-02
添加 UrsAI2SharedTcpClient 变体
1.2
2021-01-09
修复断开连接时 Write/Writeln 的行为
1.3...
App Inventor 2 蓝牙发送十六进制字节方案：文本转Hex字节详解 - App应用开...
...题描述用户在文本框输入"ABCD"，想通过蓝牙发送 0xAB 0xCD 两个字节，而不是四个ASCII字符（0x41 0x42 0x43 0x44）。
每两个字符代表一个十六进制字节，需要将字符对解析为实际的字节值。
问题本质输入期望发送实际发送（...
How to find corresponding log files folder for a web site?
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201
Ok, I've found this property - it's called "site id" and resides in "Advanced Properties" of th...
Regular expression to allow spaces between words
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tl;dr
Just add a space in your character class.
^[a-zA-Z0-9_ ]*$
Now, if you want to be strict...
The above isn't exactly correct. Due to the fact that * means zero or more, it would match all of the following cases that one would not usually mean to match:
An empty str...
Sleep Command in T-SQL?
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Look at the WAITFOR command.
E.g.
-- wait for 1 minute
WAITFOR DELAY '00:01'
-- wait for 1 second
WAITFOR DELAY '00:00:01'
This command allows you a high degree of precision but is only accurate within 10ms - 16ms on a typical machine as it relies on GetTickCount. So, for example, the call W...
Get first day of week in SQL Server
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150
To answer why you're getting a Monday and not a Sunday:
You're adding a number of weeks to the ...
NULL vs nil in Objective-C
...ter), so you'd definitely use NULL (which is sometimes declared as (void *)0) rather than nil (which is of type id).
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Which HTML5 reset CSS do you use and why? [closed]
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40
Real talk: Despite the markdowns kaikai is right, you only need to reset *padding & margin t...
How do I get the localhost name in PowerShell?
... I get the localhost (machine) name in PowerShell? I am using PowerShell 1.0.
7 Answers
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