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Change a Git remote HEAD to point to something besides master
...stored locally in your local repo, in remotes/<name>/HEAD.
With Git 2.29 (Q4 2020), "git remote set-head(man)" that failed still said something that hints the operation went through, which was misleading.
See commit 5a07c6c (17 Sep 2020) by Christian Schlack (cschlack).
(Merged by Junio C Ha...
lexers vs parsers
...l 3).
Grammar understood by parsers: context-free grammar (Chomsky's level 2).
They attach semantics (meaning) to the language pieces they find.
Lexers attach meaning by classifying lexemes (strings of symbols from the input) as the particular tokens. E.g. All these lexemes: *, ==, <=, ^ will ...
Add a CSS border on hover without moving the element [duplicate]
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edited Feb 26 '18 at 21:32
answered Mar 8 '12 at 4:12
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How to detect scroll position of page using jQuery
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325
You can extract the scroll position using jQuery's .scrollTop() method
$(window).scroll(functi...
What are “Groovy” and “Grails” and what kinds of applications are built using them?
...Groovy?
Originally, a dynamic language for the JVM. However, since Groovy 2.0, both static and dynamic typing are supported.
What is Grails?
Grails (previously known as "Groovy on Grails") is a programming framework based on Groovy and inspired by Ruby on Rails (there are differences, but there ar...
How to throw an exception in C?
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edited Apr 28 at 11:43
João Farias
1711212 bronze badges
answered May 23 '10 at 12:49
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Issue with adding common code as git submodule: “already exists in the index”
...eanings in git.)
I suspect that you will see something like:
160000 d00cf29f23627fc54eb992dde6a79112677cd86c 0 projectfolder
(i.e. a line beginning with 160000), in which case the repository in projectfolder has already been added as a "gitlink". If it doesn't appear in the output of git subm...
Relative paths based on file location instead of current working directory [duplicate]
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edited Feb 15 '17 at 21:00
asmeurer
72.5k2222 gold badges141141 silver badges212212 bronze badges
a...
Linux日志管理Rsyslog入门 - C/C++ - 清泛网 - 专注IT技能提升
...since rsyslog v3.
# If you want to use them, switch to compatibility mode 2 by "-c 2"
# See rsyslogd(8) for more details
SYSLOGD_OPTIONS="-d -n"
如果你想测试Rsyslog是否工作的话，可以通过系统内建的logger命令发消息；如果你想测试Rsyslog性能如何的话，可以...
What are the differences among grep, awk & sed? [duplicate]
...lace any occurrence of the characters 'cat' by 'dog'
Awk
$ awk '{print $2}' file.txt
# this will print the second column of file.txt
Basic awk usage:
Compute sum/average/max/min/etc. what ever you may need.
$ cat file.txt
A 10
B 20
C 60
$ awk 'BEGIN {sum=0; count=0; OFS="\t"} {sum+=$2; count++...