2008年12月11日 · I'm using JSLint to go through JavaScript, and it's returning many suggestions to replace == (two equals signs) with === (three equals signs) when doing things like comparing idSele_UNVEHtype.value.

2010年3月21日 · (1) That the bool call on the operands has to return True or False isn't completely correct. It's just the first operand that needs to return a boolean in it's __bool__ method:

2009年2月7日 · The above makes it sound as though a == comparison wouldn't check all the things in the first bullet point, "the same sequence of characters, same length, and same characters in corresponding positions" but in fact it does.

2008年8月29日 · Good question. These two operators work the same in PHP and C#. | is a bitwise OR. It will compare two values by their bits.

2016年7月20日 · MS-DOS 1.0 retained the command line option (or switch) character convention of '/' from CP/M. At that time there was no directory structure in the file system and no conflict.

Why there are four logical operators: &, && |, || What's the differences in usage? Yes, I've checked the docs, yet I'm a little bit confused.

Java has 5 different boolean compare operators: &, &&, |, ||, ^ & and && are "and" operators, | and || "or" operators, ^ is "xor"

In CMD, '&&' means "execute command 1, and if it succeeds, execute command 2". I have used it for things like:

2012年7月23日 · It looks like you are missing one set of brackets: SELECT Store_Id , Paid_Out_Amount , Paid_Out_Comment , Paid_Out_Datetime , Update_UserName , Till_Number FROM Paid_Out_Tb WHERE Store_Id = 1929 AND Paid_Out_Datetime >= DATEADD(day, DATEDIFF(day, 0, GETDATE()) - 1, 0) AND Paid_Out_Datetime < DATEADD(day, …

2010年5月9日 · Very old question I know, but since this is what came up on the top of my search results, I'll go ahead and answer it with modern day CSS.