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Determine the path of the executing BASH script [duplicate]
..._PATH="`( cd \"$MY_PATH\" && pwd )`" # absolutized and normalized
if [ -z "$MY_PATH" ] ; then
# error; for some reason, the path is not accessible
# to the script (e.g. permissions re-evaled after suid)
exit 1 # fail
fi
echo "$MY_PATH"
...
PHP substring extraction. Get the string before the first '/' or the whole string
...
oh. okay. would have been nice if it was possible.
– anon355079
Dec 20 '09 at 14:22
36
...
What are the differences and similarities between ffmpeg, libav, and avconv?
...the FFmpeg libraries, is unrelated to the Libav project.
How to tell the difference
If you are using avconv then you are using Libav. If you are using ffmpeg you could be using FFmpeg or Libav. Refer to the first line in the console output to tell the difference: the copyright notice will either m...
What is the difference between and ?
What is the difference between <html lang="en"> and <html lang="en-US"> ? What other values can follow the dash?
...
Table fixed header and scrollable body
...to recreate and render "borders" use the box-shadow property:
/* Borders (if you need them) */
.tableFixHead,
.tableFixHead td {
box-shadow: inset 1px -1px #000;
}
.tableFixHead th {
box-shadow: inset 1px 1px #000, 0 1px #000;
}
.tableFixHead { overflow-y: auto; height: 100px; }
...
How to find the files that are created in the last hour in unix
...
If the dir to search is srch_dir then either
$ find srch_dir -cmin -60 # change time
or
$ find srch_dir -mmin -60 # modification time
or
$ find srch_dir -amin -60 # access time
shows files created, modified or access...
Can git operate in “silent mode”?
...on jobs:
quiet_git() {
stdout=$(tempfile)
stderr=$(tempfile)
if ! git "$@" </dev/null >$stdout 2>$stderr; then
cat $stderr >&2
rm -f $stdout $stderr
exit 1
fi
rm -f $stdout $stderr
}
This will suppress stdout and stderr, unless the git...
const char* concatenation
... hard coded array size. That's a really bad habit to get into, especially if you don't know what size "one" and "two" are.
– Paul Tomblin
Jan 3 '10 at 15:58
1
...
Iterate through every file in one directory
... do something like this:
Dir.foreach('/path/to/dir') do |filename|
next if filename == '.' or filename == '..'
# Do work on the remaining files & directories
end
Dir::foreach and Dir::entries (as well as Dir::each_child and Dir::children) also include hidden files & directories. Often...
How to delete migration files in Rails 3
...rsion before the one I want to delete.
Delete the migration file manually.
If there are pending migrations (i.e., the migration I removed was not the last one), I just perform a new rake db:migrate again.
If your application is already on production or staging, it's safer to just write another mig...