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Bash command to sum a column of numbers [duplicate]
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10 Answers
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Why is inserting in the middle of a linked list O(1)?
...on linked lists , inserting in the middle of a linked list is considered O(1). I would think it would be O(n). Wouldn't you need to locate the node which could be near the end of the list?
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How do you remove a specific revision in the git history?
...ks more or less like this:
pick deadbee The oneline of this commit
pick fa1afe1 The oneline of the next commit
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The oneline descriptions are purely for your pleasure; git-rebase will not look at them but at the commit names ("deadbee" and "fa1afe1" in this example), so do not delete or edit the...
Is Big O(logn) log base e?
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edited Feb 15 '10 at 5:23
community wiki
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Why does string::compare return an int?
...like short or char ? My understanding is that this method only returns -1, 0 or 1.
9 Answers
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How can I see the SQL that will be generated by a given ActiveRecord query in Ruby on Rails
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11 Answers
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Ruby ampersand colon shortcut [duplicate]
...foo }
something(&:foo)
Also, to_proc on Symbol is implemented in Ruby 1.8.7 and 1.9, so it is in fact a "ruby thing".
So, to sum up: & calls to_proc on the object and passes it as a block to the method, and Ruby implements to_proc on Symbol.
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Replace X-axis with own values
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179
Not sure if it's what you mean, but you can do this:
plot(1:10, xaxt = "n", xlab='Some Letter...
Get first and last date of current month with JavaScript or jQuery [duplicate]
...= new Date();
var firstDay = new Date(date.getFullYear(), date.getMonth(), 1);
var lastDay = new Date(date.getFullYear(), date.getMonth() + 1, 0);
or you might prefer:
var date = new Date(), y = date.getFullYear(), m = date.getMonth();
var firstDay = new Date(y, m, 1);
var lastDay = new Date(y, m...
How to get a list of all valid IP addresses in a local network? [closed]
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410
Install nmap,
sudo apt-get install nmap
then
nmap -sP 192.168.1.*
or more commonly
nmap ...