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Bash set +x without it being printed
... on) set -x ;;
off) set +x ;;
esac
}
alias xtrace='{ _xtrace $(cat); } 2>/dev/null <<<'
This allows you to enable and disable xtrace as in the following, where I'm logging how the arguments are assigned to variables:
xtrace on
ARG1=$1
ARG2=$2
xtrace off
And you get outpu...
Can I set a breakpoint on 'memory access' in GDB?
I am running an application through gdb and I want to set a breakpoint for any time a specific variable is accessed / changed. Is there a good method for doing this? I would also be interested in other ways to monitor a variable in C/C++ to see if/when it changes.
...
Using Node.js only vs. using Node.js with Apache/Nginx
...n server to serve static files as so many (every?) competing technologies (PHP, Ruby, Python, etc) require a web server like HTTPD or Nginx in front of the application server(s).
Every objective reason I have ever read against serving static files with Node revolves around the idea of using what yo...
fatal: 'origin' does not appear to be a git repository
...g is your global config for git.
There are three levels of config files.
cat $(git rev-parse --show-toplevel)/.git/config
(mentioned by bereal) is your local config, local to the repo you have cloned.
you can also type from within your repo:
git remote -v
And see if there is any remote named...
What are the best practices for JavaScript error handling?
...is:
function log(sev,msg) {
var img = new Image();
img.src = "log.php?sev=" +
encodeURIComponent(sev) +
"&msg=" + encodeURIComponent(msg);
}
// usage
log(1, "Something bad happened.")
// Auto-log uncaught JS errors
window.onerror = function(msg, url, line) {
log(1,...
Git: which is the default configured remote for branch?
...v shows that info for all branches. (formatted in blue in most terminals)
cat .git/config shows this also.
For reference:
how do I get git to show me which branches are tracking what?
What is this branch tracking (if anything) in git?
...
How to change line-ending settings
... . - text gives is not a valid attribute name: .gitattributes:1 please put cat .gitattributes
– jangorecki
Apr 15 at 14:36
...
show all tags in git log
... can see it in output of "git show <tag>" and also in output of "git cat-file -p <tag>", where <tag> is heavyweight tag, e.g. v1.6.3 in git.git repository),
and also is default name of tag reference (reference in "refs/tags/*" namespace) pointing to a tag object.
Note that the...
Git: How to remove file from historical commit?
...cached --ignore-unmatch path/to/mylarge_50mb_file' \
--tag-name-filter cat -- --all
Like the rebasing option described before, filter-branch is rewriting operation. If you have published history, you'll have to --force push the new refs.
The filter-branch approach is considerably more powerfu...
How do I use extern to share variables between source files?
...is informed that a
variable exists (and this is its type); it does not allocate the
storage for the variable at that point.
A variable is defined when the compiler allocates the storage for
the variable.
You may declare a variable multiple times (though once is sufficient);
you may only define it...