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How to remove the lines which appear on file B from another file A?
...e a set, where there won't be any duplicate values (keys)
!($0 in a) we're now in the next file(s), in is a contains test, here it's checking whether current line is in the set we populated in the first step from the first file, ! negates the condition. What is missing here is the action, which by...
What is the basic difference between the Factory and Abstract Factory Design Patterns? [closed]
...an IFruitFactory or an IJuiceFactory, without requiring your warehouse to know anything about fruits or juices.
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How to do a non-greedy match in grep?
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eegg: dot all modifier is also known as multiline. It's a modifier that changes the "." match behavior to include newlines (normally it doesn't). There's no such modifier in grep, but there is in pcregrep.
– A. Wilson
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keytool error Keystore was tampered with, or password was incorrect
...r description I assume you are on windows machine and your home is abc
So Now : Cause
When you run this command
keytool -genkey -alias tomcat -keyalg RSA
because you are not specifying an explicit keystore it will try to generate (and in your case as you are getting exception so to update) key...
Prevent double submission of forms in jQuery
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Timing approach is wrong - how do you know how long the action will take on client's browser?
How to do it
$('form').submit(function(){
$(this).find(':submit').attr('disabled','disabled');
});
When form is submitted it will disable all submit buttons inside....
node.js child process - difference between spawn & fork
...uire('child_process').fork('child.js'); for example on my main app, I will now have 2 seperate cores running. If I were to run a heavy for loop in the child.js (process), I'd essentially be utilizing more cores to power child.js, right? Would that cpu usage be effecting my main app core though?
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Task not serializable: java.io.NotSerializableException when calling function outside closure only o
...e Serialisable interface, so this is not what's causing your task to fail. Now this doesn't mean that you can serialise an RDD with Spark and avoid NotSerializableException
Spark is a distributed computing engine and its main abstraction is a resilient distributed dataset (RDD), which can be viewed...
SVN:externals equivalent in Git?
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FYI, it is now possible to specify specific revisions with svn:externals now (since 1.5 or 1.6 I believe?)
– Nate Parsons
Sep 22 '10 at 21:14
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What is a monad?
...p(x => [x + 1])
Here we supply an operation which returns an Array, so now it conforms to the pattern. The flatMap method executes the provided function for every element in the array. It expects an array as result for each invocation (rather than single values), but merges the resulting set of...
Folder structure for a Node.js project
... folder does has different meanings for different people on some folders.
Now, having done multiple projects, in addition to explanation in all other answers, on the folder structure itself, I would strongly suggest to follow the structure of Node.js itself, which can be seen at: https://github.com...