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Possible Duplicate:
What does “javascript:void(0)” mean?
What doesvoid 0
mean?
在文件中http://underscorejs.org/underscore.js ,可以看到这样的代码块:
// Is a given variable undefined?
_.isUndefined = function(obj) {
return obj === void 0;
};
我不明白void 0
部分,很奇怪。怎么理解?