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Finding the max value of an attribute in an array of objects
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808
To find the maximum y value of the objects in array:
Math.max.apply(Math, array.map(function(o...
How to make an app's background image repeat
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430
Ok, here's what I've got in my app. It includes a hack to prevent ListViews from going black whi...
Objective-C - Remove last character from string
...hat method you can trim your string like this:
if ([string length] > 0) {
string = [string substringToIndex:[string length] - 1];
} else {
//no characters to delete... attempting to do so will result in a crash
}
If you want a fancy way of doing this in just one line of code you...
How to write a Ruby switch statement (case…when) with regex and backreferences?
... groups are always stored in pseudo variables $1 to $9:
case foo
when /^([0-9][0-9])/
print "the month is #{$1}"
else
print "something else"
end
You can also use the $LAST_MATCH_INFO pseudo variable to get at the whole MatchData object. This can be useful when using named captures:
case ...
Reading output of a command into an array in Bash
...=$'\n' read -r -d '' -a my_array < <( my_command && printf '\0' )
Please make sure you use exactly this form, i.e., make sure you have the following:
IFS=$'\n' on the same line as the read statement: this will only set the environment variable IFS for the read statement only. So it...
Does static constexpr variable inside a function make sense?
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240
The short answer is that not only is static useful, it is pretty well always going to be desired...
Javascript How to define multiple variables on a single line?
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edited Nov 12 '10 at 16:39
answered Nov 12 '10 at 16:27
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GLib compile error (ffi.h), but libffi is installed
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270
If you have a Debian-based Linux OS with apt-get:
sudo apt-get install libffi-dev
With a Redh...
How to insert an item into an array at a specific index (JavaScript)?
...want is the splice function on the native array object.
arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert).
In this example we will create an array and add an element to it into index 2:
var arr = [];
arr[0] = "...
Better way of getting time in milliseconds in javascript?
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answered Feb 2 '11 at 12:40
Joeri SebrechtsJoeri Sebrechts
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