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What linux shell command returns a part of a string? [duplicate]
I want to find a linux command that can return a part of the string. In most programming languages, it's the substr() function. Does bash have any command that can be used for this purpose. I want to be able to do something like this...
substr "abcdefg" 2 3 - prints cde .
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How can I pop-up a print dialog box using Javascript?
I have a page with a "Print" link that takes the user to a printer-friendly page. The client wants a print dialog box to appear automatically when the user arrives at the print-friendly page. How can I do this with javascript?
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Looping in a spiral
A friend was in need of an algorithm that would let him loop through the elements of an NxM matrix (N and M are odd). I came up with a solution, but I wanted to see if my fellow SO'ers could come up with a better solution.
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With bash, how can I pipe standard error into another process?
It's well known how to pipe the standard ouput of a process into another processes standard input:
5 Answers
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How can I limit possible inputs in a HTML5 “number” element?
For <input type="number"> element, maxlength is not working. How can I restrict the maxlength for that number element?
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What is the use case of noop [:] in bash?
I searched for noop in bash (:), but was not able to find any good information. What is the exact purpose or use case of this operator?
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Add support library to Android Studio project
I just installed the new Android Studio and I'm looking for a way to import the support library for Android.
6 Answers
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nServiceBus vs Mass Transit vs Rhino Service Bus vs other?
Just doing some quick spikes into possibly using a messaging system to process files that are in a nicely decoupled work flow system.
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Trimming a huge (3.5 GB) csv file to read into R
So I've got a data file (semicolon separated) that has a lot of detail and incomplete rows (leading Access and SQL to choke). It's county level data set broken into segments, sub-segments, and sub-sub-segments (for a total of ~200 factors) for 40 years. In short, it's huge, and it's not going to fit...
jQuery deferreds and promises - .then() vs .done()
I've been reading about jQuery deferreds and promises and I can't see the difference between using .then() & .done() for successful callbacks. I know Eric Hynds mentions that .done() and .success() map to the same functionality but I'm guessing so does .then() as all the callbacks are al...