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How do you round a floating point number in Perl?
...ntf() or printf() is usually the easiest
route.
printf("%.3f", 3.1415926535); # prints 3.142
The POSIX module (part of the standard Perl distribution) implements
ceil(), floor(), and a number of other mathematical and trigonometric
functions.
use POSIX;
$ceil = ceil(3.5); ...
How to return an empty ActiveRecord relation?
... |
edited Nov 9 '16 at 2:25
Patrick Brinich-Langlois
1,2301414 silver badges2626 bronze badges
answer...
How to check if AlarmManager already has an alarm set?
...
325
Following up on the comment ron posted, here is the detailed solution. Let's say you have regi...
Auto-center map with multiple markers in Google Maps API v3
...arker({
position: new google.maps.LatLng(locations[i][1], locations[i][2]),
map: map
});
//extend the bounds to include each marker's position
bounds.extend(marker.position);
google.maps.event.addListener(marker, 'click', (function(marker, i) {
return function() {
infowin...
How to implement “select all” check box in HTML?
...
29 Answers
29
Active
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How to define hash tables in Bash?
...ray_$index=$value"
# Get a value:
arrayGet() {
local array=$1 index=$2
local i="${array}_$index"
printf '%s' "${!i}"
}
Let's use it:
$ sound=moo
$ animal=cow
$ declare "animals_$sound=$animal"
$ arrayGet animals "$sound"
cow
Note: declare cannot be put in a function. Any use of d...
Convert data.frame column to a vector?
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211
I'm going to attempt to explain this without making any mistakes, but I'm betting this will at...
USB Debugging option greyed out
I have an LG-E405 phone running Android 2.3.6.
15 Answers
15
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Quick-and-dirty way to ensure only one instance of a shell script is running at a time
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