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How can I extract a predetermined range of lines from a text file on Unix?
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sed -n '16224,16482p;16483q' filename > newfile
From the sed manual:
p -
Print out the pattern space (to the standard output). This command is usually only used in conjunction with the -n command-line option.
n -
If auto-print is not...
How do I test a file upload in rails?
...nsible for accepting JSON files and then processing the JSON files to do some user maintenance for our application. In user testing the file upload and processing works, but of course I would like to automate the process of testing the user maintenance in our testing. How can I upload a file to a co...
Whitespace Matching Regex - Java
... I feel like the biggest idiot on earth. Neither I nor two other people seemed to notice that. I guess the stupidest little errors throw us off sometimes, eh?
– user372743
Jan 19 '11 at 2:09
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Easy way to write contents of a Java InputStream to an OutputStream
...yte buffer code isn't difficult to write, but I suspect I'm just missing something which would make my life easier (and the code clearer).
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append multiple values for one key in a dictionary [duplicate]
...ys", where items are implicitly associated with each other by having the same index rather than being proper children of a container that encompasses them both.
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What is the maximum recursion depth in Python, and how to increase it?
...a guard against a stack overflow, yes. Python (or rather, the CPython implementation) doesn't optimize tail recursion, and unbridled recursion causes stack overflows. You can check the recursion limit with sys.getrecursionlimit:
import sys
print(sys.getrecursionlimit())
and change the recursion lim...
Who sets response content-type in Spring MVC (@ResponseBody)
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Simple declaration of the StringHttpMessageConverter bean is not enough, you need to inject it into AnnotationMethodHandlerAdapter:
<bean class = "org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="mess...
Create a string of variable length, filled with a repeated character
So, my question has been asked by someone else in it's Java form here: Java - Create a new String instance with specified length and filled with specific character. Best solution?
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PHP case-insensitive in_array function
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To make it a drop-in replacement for in_array, returning a bool, it becomes: count(preg_grep('/^'.preg_quote($needle).'/$',$a)>0). Not so elegant, then. (Notice the ^ and $ characters are required, unless partial matching is desired.) However if you...
Remove specific characters from a string in Python
...nced pythonators, who will see a doubly-nested structure and think for a moment that something more complicated is going on.
Starting in Python 2.6 and newer Python 2.x versions *, you can instead use str.translate, (but read on for Python 3 differences):
line = line.translate(None, '!@#$')
or r...