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Blocks and yields in Ruby
...zling at first.
In Ruby, methods may receive a code block in order to perform arbitrary segments of code.
When a method expects a block, it invokes it by calling the yield function.
This is very handy, for instance, to iterate over a list or to provide a custom algorithm.
Take the following ...
Diff output from two programs without temporary files
...
For anyone curious, this is how you perform process substitution in using the Fish shell:
Bash:
diff <(./a) <(./b)
Fish:
diff (./a | psub) (./b | psub)
Unfortunately the implementation in fish is currently deficient; fish will either hang or use a tem...
JavaScript regex multiline flag doesn't work
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For performance issues, it is highly recommended to use the *? quantifier instead of * in order to avoid greediness. This will avoid catching the last <h1> of the document: that's probably not what you want and that's not effi...
What is the difference between '>' and a space in CSS selectors?
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The demo is nice but really just ancillary to the information which answers the question; information that's already in the other three answers. Maybe if this question were asked today, that'd be useful, but if you're going to necro an >8-year-old question, it should really...
.bashrc/.profile is not loaded on new tmux session (or window) — why?
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Former answers provided solutions but didn't explain the reason. Here it is.
This is related to the Bash init files. By default, ~/.bashrc is used in an interactive, non-login shell. It won't be sourced in a login shell. Tmu...
Convert Go map to json
...xchange.using('gps', function() { StackExchange.gps.track('embedded_signup_form.view', { location: 'question_page' }); });
$window.unbind('scroll', onScroll);
}
};
...
How to copy a local Git branch to a remote repo
... in the origin repository by copying the current experimental branch.
This form is only needed to create a new branch or tag in the remote repository when the local name and the remote name are different; otherwise, the ref name on its own will work.
Or, like mentioned in git tip, you can set up a "...
Java Persistence / JPA: @Column vs @Basic
... Table, Column, ... In your question 'Basic' is an annotation to provide information about the relational entity attribute while 'Column' provides information on how to map it to a database column.
– Bruno Ranschaert
Nov 18 '15 at 8:19
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How to un-escape a backslash-escaped string?
...he unicode-escape codec answer is for when it's not a repr, but some other form of escaped text (not surrounded by quotes as part of the string data itself).
– ShadowRanger
Aug 18 '18 at 2:55
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Good ways to manage a changelog using git?
...at message, and not all the little commits that you merged, which together form the feature:
git log --pretty=%s --first-parent # only follow first parent of merges
You might be able to augment this with a script of your own, which could do things like strip out the "Merged branch" bits, normali...