Miroirs/c-urs_-toil-s
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[ "", "" ].join( '' ) is faster than "" + ""

Browse source 
http://code.google.com/p/jslibs/wiki/JavascriptTips#Multiple_string_concatenation
This commit is contained in:
Gwenhael Le Moine 2011-07-05 09:45:14 +02:00
parent f775d6ec8e
commit f3fce15101
1 changed files with 4 additions and 4 deletions
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8
star.js/js/star.js
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@ -82,7 +82,7 @@ function get_cell( state, x, y ) {
function set_cell( state, x, y, value ) {
p = x + ( y * LEVEL_WIDTH );
state.board = state.board.substring( 0, p ) + value + state.board.substring( p+1, state.board.length );
state.board = [ state.board.substring( 0, p ), value, state.board.substring( p+1, state.board.length ) ].join( '' );
return state;
}
@ -99,11 +99,11 @@ function format_level( state ) {
dl = "";
for ( i = 0 ; i < LEVEL_HEIGHT * LEVEL_WIDTH ; i++ ) {
c = state.board[ i ];
classes = "starcell " + css_classes[ c ];
classes = [ "starcell ", css_classes[ c ] ].join( '' );
if ( state.moving == c) {
classes = classes + " selected ";
classes = [ classes, " selected " ].join( '' );
}
dl = dl + "<span class=\"" + classes + "\">" + c + "</span>";
dl = [ dl, "<span class=\"", classes, "\">", c, "</span>"].join( '' );
}
return dl;
}