I am learning the Prototype library in-depth and my question is about
the inner logic of the Template.evaluate method. Everything is clear
as long as the original match provided by the gsub function from the
stored template is further processed.
a.) what kind of scenario is the inner regular expresion used to
handle?
b.) what is going on in the while loop
/*
cut
*/
var pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;
match = pattern.exec(expr);
if (match == null) return before;
while (match != null) {
var comp = match[1].startsWith('[') ? match[2].replace(/\\\\]/
g, ']') : match[1];
ctx = ctx[comp];
if (null == ctx || '' == match[3]) break;
expr = expr.substring('[' == match[3] ? match[1].length :
match[0].length);
match = pattern.exec(expr);
}
/*
cut
*/
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