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How to remove the lines which appear on file B from another file A?
...-to-remove> <all-lines>
works on non-sorted files
maintains the order
is POSIX
Example:
cat <<EOF > A
b
1
a
0
01
b
1
EOF
cat <<EOF > B
0
1
EOF
grep -Fvxf B A
Output:
b
a
01
b
Explanation:
-F: use literal strings instead of the default BRE
-x: only consider ma...
What's the best way to convert a number to a string in JavaScript? [closed]
... string (in terms of speed advantage, clarity advantage, memory advantage, etc) ?
23 Answers
...
How can I explicitly free memory in Python?
...d for that, del is equally effective with exits-from-scope, reassignments, etc.
– Charles Duffy
Nov 20 '18 at 13:14
Disable/enable an input with jQuery?
... to disable ALL form input controls - incl. checkboxes, radios, textareas, etc. - you have to select ':input', not just 'input'. The latter selects only actual <input> elements.
– Cornel Masson
Aug 16 '12 at 8:10
...
How to save and restore multiple different sessions in Vim?
...
function! MakeSession()
let b:sessiondir = $HOME . "/.vim/sessions" . getcwd()
if (filewritable(b:sessiondir) != 2)
exe 'silent !mkdir -p ' b:sessiondir
redraw!
endif
let b:filename = b:sessiondir . '/session.vim'
exe "mksession! " . b:filename
endfunction
function! LoadSession(...
Add custom messages in assert?
...an define your own macro/function, using __FILE__, __BASE_FILE__, __LINE__ etc, with your own function that takes a custom message
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How to duplicate virtualenv
...avorite text editor, you'll see something like:
Django==1.3
Fabric==1.0.1
etc...
Now, edit the line that says Django==x.x to say Django==1.3 (or whatever version you want to install in your new virtualenv).
Lastly, activate your new virtualenv, and run:
pip install -r requirements.txt
And pip...
Cloning a MySQL database on the same MySql instance
...
How can we also copy functions, events etc. created in the original database? This looks only copies tables.
– Dogan Askan
Apr 9 '18 at 23:20
...
Debug code-first Entity Framework migration codes
...ep#3: Open a console inside the output directory (/bin/Debug, /bin/Release etc) containing the dll of your migrations
Step#4: Invoke migrate.exe with the /scriptFile parameter to launch the debugger and actually debug the desired db-migration
migrate.exe "Your.Migrations.Assembly.dll" /scriptFile=...
How do I push a new local branch to a remote Git repository and track it too?
... I still needed to 'git branch --set-upstream-to origin/remote' in order for 'git status' to correctly report my branch status with respect to the remote branch.
– Paul Whipp
Jul 4 '14 at 1:17
...