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Why is whitespace sometimes needed around metacharacters?

A few months ago I tattooed a fork bomb on my arm, and I skipped the whitespaces, because I think it looks nicer without them. But to my dismay, sometimes (not always) when I run it in a shell it doesn't start a fork bomb, but it just gives a syntam>xm> error. ...
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python date of the previous month

I am trying to get the date of the previous month with python. Here is what i've tried: 12 Answers ...
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Under what conditions is a JSESSIONID created?

...ode calls request.getSession() or request.getSession(true) for the first time. If you just want to get the session, but not create it if it doesn't em>xm>ist, use request.getSession(false) -- this will return you a session or null. In this case, new session is not created, and JSESSIONID cookie is not s...
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What em>xm>actly do the Vagrant commands do?

There is surprisingly no documentation on what the Vagrant commands do, other than references throughout the "getting started" tutorial. ...
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How do I revert a Git repository to a previous commit?

How do I revert from my current state to a snapshot made on a certain commit? 41 Answers ...
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What's the difference between ngModel.$modelValue and ngModel.$viewValue

I have the following ckEditor directive. At the bottom are two variations that I have seen from em>xm>amples on how to set the data in the editor: ...
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Turn off constraints temporarily (MS SQL)

I'm looking for a way to temporarily turn off all DB's constraints (eg table relationships). 5 Answers ...
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Where does the “flatmap that s***” idiomatic em>xm>pression in Scala come from?

What is so powerful about flatmap that it deserves such a place in the Scala folklore? 4 Answers ...
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Joda-Time: what's the difference between Period, Interval and Duration?

In Joda-Time 2, what is the difference between the three kinds of time spans: 2 Answers ...
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Can someone em>xm>plain collection_select to me in clear, simple terms?

I am going through the Rails API docs for collection_select and they are god-awful. 2 Answers ...