revi-archive/phorge-phorge
1
0
Fork 0
mirror of https://we.phorge.it/source/phorge.git synced 2024-12-22 13:30:55 +01:00
Code Issues Releases Wiki Activity

Clarify pitfalls document.

Browse source
This commit is contained in:
epriestley 2011-06-27 17:40:34 -07:00
parent e24f8b31ad
commit 63436ad74a
1 changed files with 5 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
src/docs/flavortext/php_pitfalls.diviner
View file

@ -4,9 +4,9 @@
This document discusses difficult traps and pitfalls in PHP, and how to avoid, This document discusses difficult traps and pitfalls in PHP, and how to avoid,
work around, or at least understand them. work around, or at least understand them.
= array_merge() in Incredibly Slow = = array_merge() in Incredibly Slow When Merging A List of Arrays =
If you merge arrays like this: If you merge a list of arrays like this:
COUNTEREXAMPLE COUNTEREXAMPLE
$result = array(); $result = array();
@ -14,9 +14,9 @@ If you merge arrays like this:
$result = array_merge($result, $one_list); $result = array_merge($result, $one_list);
} }
...your program now has a huge runtime runtime because it generates a large ...your program now has a huge runtime because it generates a large number of
number of intermediate arrays and copies every element it has previously seen intermediate arrays and copies every element it has previously seen each time
each time you iterate. you iterate.
In a libphutil environment, you can use ##array_mergev($list_of_lists)## In a libphutil environment, you can use ##array_mergev($list_of_lists)##
instead. instead.