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- Understanding The Modulus Operator - Stack Overflow
I understand the Modulus operator in terms of the following expression: 7 % 5 This would return 2 due to the fact that 5 goes into 7 once and then gives the 2 that is left over, however my confusion
- symbols - What is the meaning of + in a regex? - Stack Overflow
+ can actually have two meanings, depending on context Like the other answers mentioned, + usually is a repetition operator, and causes the preceding token to repeat one or more times a+ would be expressed as aa* in formal language theory, and could also be expressed as a{1,} (match a minimum of 1 times and a maximum of infinite times)
- Meaning of $? (dollar question mark) in shell scripts
What does echo $? mean in shell programming?This is the exit status of the last executed command For example the command true always returns a status of 0 and false always returns a status of 1: true echo $? # echoes 0 false echo $? # echoes 1 From the manual: (acessible by calling man bash in your shell) ? Expands to the exit status of the most recently executed foreground pipeline By
- What are ^. * and . *$ in regular expressions? - Stack Overflow
You'll need to complete a few actions and gain 15 reputation points before being able to upvote Upvoting indicates when questions and answers are useful What's reputation and how do I get it? Instead, you can save this post to reference later
- 403 Forbidden vs 401 Unauthorized HTTP responses
Meaning if you have your own roll-your-own login process and never use HTTP Authentication, 403 is always the proper response and 401 should never be used Detailed and In-Depth From RFC2616 10 4 2 401 Unauthorized The request requires user authentication
- What is exactly the meaning of === in javascript?
What is exactly the meaning of "===" in javascript? [duplicate] Asked 16 years ago Modified 12 years, 4 months ago Viewed 71k times
- What is the meaning of ^M in git diff? - Stack Overflow
^M represents carriage return (CR) This diff means something removed a Unicode BOM from the beginning of the line and added a CR at the end If ^M is in the new-changes side (right green side), then that means the file's line-endings were changed from LF to CRLF, otherwise, file was CRLF and is now changed to LF The ^ symbol stands for Control, so ^M means Ctrl+M To get from that to the
- BG,BL,GB,GL分别是什么意思？_百度知道
一、什么是BG？ BG即是“boy and girl”的简称，起源于并多用于动漫领域。表意即为“异性恋”，通常人们也习惯称之为“正常向”，“男女向”。 二、BG多出现的范围 通常人们使用BG这个词，多数是在动漫周边范围，如讨论动漫性质，动漫人物的配对，和同人文中使用。历年来虽然BG向的震撼强度和
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