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function formatter(format, parse) {return {'format':format, 'parse':parse || format};}
function toString(obj) {return (isDefined(obj) && obj !== null) ? "" + obj : obj;}
var NUMBER = /^\s*[-+]?\d*(\.\d*)?\s*$/;
extend(angularFormatter, {
'noop':formatter(identity, identity),
'boolean':formatter(toString, toBoolean),
'number':formatter(toString,
function(obj){
if (isString(obj) && NUMBER.exec(obj)) {
return obj ? 1*obj : null;
}
throw "Not a number";
}),
'list':formatter(
function(obj) { return obj ? obj.join(", ") : obj; },
function(value) {
var list = [];
foreach((value || '').split(','), function(item){
item = trim(item);
if (item) list.push(item);
});
return list;
}
),
'trim':formatter(
function(obj) { return obj ? trim("" + obj) : ""; }
)
});
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