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Last active April 5, 2016 13:20
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Javascript override method only once wrapper function
function overrideOnce(object, method, callback){
// override method with original as argument
object[method] = (function(original){
return function(){
// store whatever callback does
var result = callback.apply(this, arguments);
// restore method
object[method] = original;
return result;
// usage
overrideOnce(document, 'write', function(html){
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