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How to read from a file or STDIN in Bash?
...y, ${1:--} is POSIX-compliant, so it should work in all POSIX-like shells. What won't work in all such shells is process substitution (<(...)); it'll work in bash, ksh, zsh, but not in dash, for instance. Also, better to add -r to your read command, so that it doesn't accidentally eat \ chars; p...
Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?
... is generally safer to use. But it is not portable - POSIX doesn't specify what it does and only some shells support it (beside bash, I heard ksh supports it too). For example, you can do
[[ -e $b ]]
to test whether a file exists. But with [, you have to quote $b, because it splits the argument ...
How to delete images from a private docker registry?
... D I ask you: do you really want to delete all but image D? Probably not!
What happens if you delete a tag?
If you delete the tag <version1> using the Docker REST API you will get this:
A <- B <- C <- D
|
<version2>
<latest&...
How to remove the first commit in git?
... you will not lose your work) all your commits of your current branch.
If what you want is to merge the first commit with the second one, you can use the rebase command:
git rebase -i --root
A last way could be to create an orphan branch, a branch with the same content but without any commit his...
Modern way to filter STL container?
Coming back to C++ after years of C# I was wondering what the modern - read: C++11 - way of filtering an array would be, i.e. how can we achieve something similar to this Linq query:
...
Git stash pop- needs merge, unable to refresh index
...t stash pop
help/C/scan-remote.page: needs merge
unable to refresh index
What you did was to fix the merge conflict (editing the right file, and committing it):
See "How do I fix merge conflicts in Git?"
What the blog post's author did was:
julita@yulys:~/GNOME/baobab/help/C$ git reset --hard or...
Auto Generate Database Diagram MySQL [closed]
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+1 This was the only tool that did what I wanted: generate DB documentation at release time automatically.
– Lennart Rolland
Apr 14 '15 at 9:12
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Can I create a One-Time-Use Function in a Script or Stored Procedure?
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Common Table Expressions let you define what are essentially views that last only within the scope of your select, insert, update and delete statements. Depending on what you need to do they can be terribly useful.
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socket.io rooms or namespacing?
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This is what namespaces and rooms have in common (socket.io v0.9.8 - please note that v1.0 involved a complete rewrite, so things might have changed):
Both namespaces (io.of('/nsp')) and rooms (socket.join('room')) are created on t...
Simple regular expression for a decimal with a precision of 2
What is the regular expression for a decimal with a precision of 2?
17 Answers
17
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