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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, ...
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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How does LMAX's disruptor pattern work?
...to a queue, but it also shares a number of features with SEDA and Actors.
Compared to Queues:
The Disruptor provides the ability to pass a message onto another threads, waking it up if required (similar to a BlockingQueue). However, there are 3 distinct differences.
The user of the Disruptor def...
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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impr...
execJs: 'Could not find a JavaScript runtime' but execjs AND therubyracer are in Gemfile
...box ?, I suggest you try to install a fedora rpm(long shot) https://github.com/joyent/node/wiki/Installing-Node.js-via-package-manager
or find another RH/CentOs box(that you can 'make' on) and create your own rpm and install on original RH box(if old glibc on RH plays nice).
The real issue here(I...
Make a div fill the height of the remaining screen space
...Note: Though CSS Flexible Boxes Layout specification is at the Candidate Recommendation stage, not all browsers have implemented it. WebKit implementation must be prefixed with -webkit-; Internet Explorer implements an old version of the spec, prefixed with -ms-; Opera 12.10 implements the latest ve...
Performing user authentication in Java EE / JSF using j_security_check
...ser authentication for a web application making use of JSF 2.0 (and if any components do exist) and Java EE 6 core mechanisms (login/check permissions/logouts) with user information hold in a JPA entity. The Oracle Java EE tutorial is a bit sparse on this (only handles servlets).
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How to use SCNetworkReachability in Swift
...Note also that registering a notifier callback is possible as of
Swift 2, compare Working with C APIs from Swift and Swift 2 - UnsafeMutablePointer<Void> to object.
Update for Swift 3/4:
Unsafe pointers cannot be simply be converted to a pointer of a
different type anymore (see - SE-0107...
Postgres NOT in array
...to ANY instead of IN as your recipient_ids input list grows: stackoverflow.com/questions/1009706/…
– derekm
Jan 9 '17 at 16:56
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How can I update my ADT in Eclipse?
...lease do the follwing:
Click on add
Add this url : https://dl-ssl.google.com/android/eclipse/
Give it any name.
It will list the updates available- which should ideally be adt 20.xx
Eclipse will restart and hopefully everything should work fine for you.
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