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How to start two threads at “exactly” the same time

The threads should start at same split second. I understand, if you do thread1.start() , it will take some milliseconds before the next execution of thread2.start() . ...
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Using :after to clear floating elements

I have a list and the li's have a float:left; . The contents after the <ul> should be aligned correctly. Therefore i can build the following: ...
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How to diff one file to an arbitrary version in Git?

How can I diff a file, say pom.xml , from the master branch to an arbitrary older version in Git? 13 Answers ...
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what is the unsigned datatype?

I've seen this unsigned "typeless" type used a couple of times, but never seen an explanation for it. I suppose there's a corresponding signed type. Here's an example: ...
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Android-java- How to sort a list of objects by a certain value within the object

Im trying to sort through an arraylist of objects by a particular value within the object. What would be the best approach to do such a thing. Should I use Collections.sort() with some kind of comparator? ...
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Add leading zeroes to number in Java? [duplicate]

Is there a better way of getting this result? This function fails if num has more digits than digits, and I feel like it should be in the library somewhere (like Integer.toString(x,"%3d") or something) ...
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How to concatenate items in a list to a single string?

Is there a simpler way to concatenate string items in a list into a single string? Can I use the str.join() function? 11...
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Rolling back a remote Git repository

I have a remote Git repository, and I need to roll back the last n commits into cold oblivion. 4 Answers ...
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Where should Rails 3 custom validators be stored?

I've seen docs/websites show that custom validators should go in a /lib or /lib/validators directory of a project. I've found (by reading an answer to another post) that they only seem to work in config/initializers . Does anyone know, or have a pointer to official documentation that shows wher...
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Purpose of returning by const value? [duplicate]

What is the purpose of the const in this? 4 Answers 4 ...