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How can I extract a predetermined range of lines from a text file on Unix?
...on.
n -
If auto-print is not disabled, print the pattern space, then, regardless, replace the pattern space with the next line of input. If
there is no more input then sed exits without processing any more
commands.
q -
Exit sed without processing any more commands or input.
...
How did Microsoft create assemblies that have circular references?
...be done by starting with an acyclic set of assemblies and using ILMerge to then coalesce the smaller assemblies into logically related groups.
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Signed to unsigned conversion in C - is it always safe?
...r
Your i will be converted to an unsigned integer by adding UINT_MAX + 1, then the addition will be carried out with the unsigned values, resulting in a large result (depending on the values of u and i).
Long Answer
According to the C99 Standard:
6.3.1.8 Usual arithmetic conversions
I...
Eclipse: Enable autocomplete / content assist
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By default in Eclipse you only have to press Ctrl-space for autocomplete. Then select the desired method and wait 500ms for the javadoc info to pop up.
If this doesn't work go to the Eclipse Windows menu -> Preferences -> Java -> Editor -> Content assist and check your settings here
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In C/C++ what's the simplest way to reverse the order of bits in a byte?
...ut not simple to create. (Except by copying a ready-made lookup table, but then one might just as well copy any solution.) For example, if the “simplest” solution is considered one that could be written on paper in an exam or interview, I would not start making a lookup table by hand and making ...
Is there any way to delete local commits in Mercurial?
...d merge your head with the incoming head, resolve any conflicts, test, and then push.
The strip command is useful when you really want to get rid of changesets that pollute the branch. In fact, if you're in this question's situation and you want to completely remove all "draft" change sets permane...
How do emulators work and how are they written? [closed]
...ic ideas and functional components. I'm going to break it into pieces and then fill in the details via edits. Many of the things I'm going to describe will require knowledge of the inner workings of processors -- assembly knowledge is necessary. If I'm a bit too vague on certain things, please as...
How to calculate age (in years) based on Date of Birth and getDate()
...>= DATEFROMPARTS(DATEPART(yyyy,@Now),DATEPART(m,@Dob),DATEPART(d,@Dob)) THEN --birthday has happened for the @now year, so add some portion onto the year difference
( 1.0 --force automatic conversions from int to decimal
* DATEDIFF(day,DATEFROMPARTS(DATEPART(yyyy,@Now...
Why does C++ not allow inherited friendship?
...odification.
Therefore if the internal representation of Foo is modified then Bar must also be modified (because friendship tightly binds Bar to Foo). If friendship was inherited then all class derived from Bar would also be tightly bound to Foo and thus require modification if Foo's internal repr...
JavaScript single line 'if' statement - best syntax, this alternative? [closed]
... use it like this:
(lemons) ? alert("please give me a lemonade") : alert("then give me a beer");
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