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Check Whether a User Exists
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You can also check user by id command.
id -u name gives you the id of that user.
if the user doesn't exist, you got command return value ($?)1
And as other answers pointed out: if all you want is just to check if the user exists, use if with id directly, ...
Undoing accidental git stash pop
I stashed some local changes before doing a complicated merge, did the merge, then stupidly forgot to commit before running git stash pop . The pop created some problems (bad method calls in a big codebase) that are proving hard to track down. I ran git stash show , so I at least know which file...
When to use ko.utils.unwrapObservable?
...re you don't know if you have been given an observable or not. This would commonly be in a custom binding where an observable or non-observable could be bound against it.
In the code that you have above, the call to valueAccessor() is not actually unwrapping an observable. It is just retrieving t...
How to configure 'git log' to show 'commit date'
How can I configure git log to show commit date instead of author date ?
3 Answers
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How to set 'auto' for upper limit, but keep a fixed lower limit with matplotlib.pyplot
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Nested attributes unpermitted parameters
...o look like this: def bill_params params.require(:bill).permit(:company, :month, :year, :dues_attributes[:amount, :person_id]) end I am now getting this error: no implicit conversion of Symbol into Integer
– jcanipar
Apr 10 '13 at 16:33
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How to add text inside the doughnut chart using Chart.js?
....value + "%", width/2 - 20, width/2, 200);
See this pull: https://github.com/nnnick/Chart.js/pull/35
here is a fiddle http://jsfiddle.net/mayankcpdixit/6xV78/ implementing the same.
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Is onload equal to readyState==4 in XMLHttpRequest?
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Seems, that mobile Safari does not come back when using onload. onreadystatechange works, though.
– Kai Hartmann
Jan 21 '14 at 14:24
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Foreign Key to non-primary key
... Related to your last question... I have a situation where I'd like composite candidate keys to be the primary key just because it semantically has more importance and describes my model best. I too would like to have a foreign key reference a newly created surrogate key for the sake of perf...
OS specific instructions in CMAKE: How to?
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@rchilton1980: Page moved, new link: gitlab.kitware.com/cmake/community/wikis/doc/cmake/…
– schnaader
Sep 10 '18 at 13:09
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