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How do I list all versions of a gem available at a remote site?
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205
Well, it was easier than I thought (well, not really, let's say as easy as it should be):
gem...
How to get the mouse position without events (without moving the mouse)?
... page with a div that covers the whole document. Inside that, create (say) 2,000 x 2,000 <a> elements (so that the :hover pseudo-class will work in IE 6, see), each 1 pixel in size. Create a CSS :hover rule for those <a> elements that changes a property (let's say font-family). In your l...
How to print a float with 2 decimal places in Java?
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263
You can use the printf method, like so:
System.out.printf("%.2f", val);
In short, the %.2f ...
How to detect a loop in a linked list?
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25 Answers
25
Active
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How to dump a table to console?
...ng the one from Penlight:
> t = { a = { b = { c = "Hello world!", 1 }, 2, d = { 3 } } }
> require 'pl.pretty'.dump(t)
{
a = {
d = {
3
},
b = {
c = "Hello world!",
1
},
2
}
}
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Why do we check up to the square root of a prime number to determine if it is prime?
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edited May 26 at 19:28
answered Apr 27 '11 at 22:04
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Number.sign() in javascript
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edited Oct 24 '16 at 12:10
Ricardo Rocha
5,96355 gold badges4343 silver badges7676 bronze badges
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Append values to a set in Python
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420
keep.update(yoursequenceofvalues)
e.g, keep.update(xrange(11)) for your specific example. Or...
Sleep until a specific time/date
...do the following:
current_epoch=$(date +%s)
target_epoch=$(date -d '01/01/2010 12:00' +%s)
sleep_seconds=$(( $target_epoch - $current_epoch ))
sleep $sleep_seconds
To add precision down to nanoseconds (effectively more around milliseconds) use e.g. this syntax:
current_epoch=$(date +%s.%N)
tar...
How to determine if a process runs inside lxc/Docker?
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edited Jul 2 '19 at 2:44
tshepang
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