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How to sum array of numbers in Ruby?
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Try this:
array.inject(0){|sum,x| sum + x }
See Ruby's Enumerable Documentation
(note: the 0 base case is needed so that 0 will be returned on an empty array instead of nil)
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What exactly is node.js used for? [closed]
Is it a web server or a programming language for server-side scripts?
9 Answers
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SSH configuration: override the default username [closed]
Is it possible to configure ssh to know what my username should be?
6 Answers
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Set angular scope variable in markup
Simple question: How can I set a scope value in html, to be read by my controller?
8 Answers
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Batch script loop
...either have to copy/paste 100 copies of this command, OR use a for loop, but the for loop expects a list of items, hence I would need 200 files to operate on, or a list of 200 items, defeating the point.
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Delete empty lines using sed
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You may have spaces or tabs in your "empty" line. Use POSIX classes with sed to remove all lines containing only whitespace:
sed '/^[[:space:]]*$/d'
A shorter version that uses ERE, for example with gnu sed:
sed -r '/^\s*$/d'
(Note that sed doe...
How can I format a String number to have commas and round?
What is the best way to format the following number that is given to me as a String?
10 Answers
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Internet Explorer 9 not rendering table cells properly
My website has always run smoothly with IE8, IE7, FF, Chrome and Safari. Now I'm testing it on IE9 and I'm experiencing a strange problem: in some pages, some tabular data renders incorrectly.
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Do I need to heartbeat to keep a TCP connection open?
...mmunicate via TCP/IP. Component A acts as a server/listener and Component B is the client. The two should communicate as quickly as possible. There can only ever be one connection at any time (though that is aside to this question). A senior developer at my company has said I need to use applica...
Google Maps: Auto close open InfoWindows?
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answered Feb 8 '10 at 18:54
Chris BChris B
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