It's not trying to load the whole file in memory. It caches one copy of the first bits of a new line (things up to "fruit") and the list of 'items' that follow. When the first bits change, the record, with the summary of items, is written and the caching/list starts anew (list = ""). So, the only significant amount of "stuff" that is ever held in memory is the list of items.
Now, if that list is huge, then the programme could be amended to write them out as it finds them. My assumption was that the list wasn't going to be more than 1 or 2 K.
---------- Post updated at 21:55 ---------- Previous update was at 21:42 ----------
Turns out that printing the list as we go is a simpler programme; just didn't see it that way the other night.
Code:
awk '
{
x = $0;
sub( "fruit.*", "", x );
gsub( ".*fruit ", "", $0 );
if( x != last ) # if first bits are different, print newline (if needed) and the current line
printf( "%s%sfruit %s", NR > 1 ? "\n" : "", x, $0 );
else # first bits are the same, print just what is after fruit
printf( "%s%s", NR > 1 ? ", " : "", $0 );
last = x;
}
END { printf( "\n" ); } # must have final newline
' input-file
Seems simple but I am having difficulty with this one: I am trying to write a single command line argument (which will be a path) - the program should print out the owner of the path.
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I am using ii for irc on my pogoplug...
hxxp://hg.suckless.org/ii/file/d163c8917af7/FAQ
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31 What other fancy stuff can I do with ii?
32 ----------------------------------------
33 It is very easy to write irc bots in ii:
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Discussion started by: crombiecrunch
9 Replies
LEARN ABOUT PHP
array_shift
ARRAY_SHIFT(3) 1 ARRAY_SHIFT(3)array_shift - Shift an element off the beginning of arraySYNOPSIS
mixed array_shift (array &$array)
DESCRIPTION array_shift(3) shifts the first value of the $array off and returns it, shortening the $array by one element and moving everything down.
All numerical array keys will be modified to start counting from zero while literal keys won't be touched.
Note
This function will reset(3) the array pointer of the input array after use.
PARAMETERS
o $array
- The input array.
RETURN VALUES
Returns the shifted value, or NULL if $array is empty or is not an array.
EXAMPLES
Example #1
array_shift(3) example
<?php
$stack = array("orange", "banana", "apple", "raspberry");
$fruit = array_shift($stack);
print_r($stack);
?>
The above example will output:
Array
(
[0] => banana
[1] => apple
[2] => raspberry
)
and orange will be assigned to $fruit.
SEE ALSO array_unshift(3), array_push(3), array_pop(3).
PHP Documentation Group ARRAY_SHIFT(3)