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[handlebars] each_with_index handlebars helper, adds an {{index}} prop accessible from within the block
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// {{#each_with_index records}} | |
// <li class="legend_item{{index}}"><span></span>{{Name}}</li> | |
// {{/each_with_index}} | |
Handlebars.registerHelper("each_with_index", function(array, fn) { | |
var total = array.length; | |
var buffer = ""; | |
//Better performance: http://jsperf.com/for-vs-foreach/2 | |
for (var i = 0, j = total; i < j; i++) { | |
var item = array[i]; | |
// stick an index property onto the item, starting with 1, may make configurable later | |
item.index = i+1; | |
item.total = total; | |
// show the inside of the block | |
buffer += fn(item); | |
} | |
// return the finished buffer | |
return buffer; | |
}); |
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