let set = new Set();
set.add({});
set.size //1
set.add({});
set.size //2
// Map实现
var m = new Map([
['a', 95],
['b', 75],
['c', 89],
['d', {
'dName': 'tomc',
'dAge': 19
}]
]);
var aValue = m.get('a'); //95
var bValue = m.get('b'); //75
var cValue = m.get('c'); //89
var dValue = m.get('d'); // tomc 19
console.log("aValue: " + aValue);
console.log("bValue: " + bValue);
console.log("cValue: " + cValue);
console.log("dValue: " + dValue.dName, dValue.dAge);
var n = new Map();
n.set('admin', 89);
console.log("n.get('admin'): " + n.get('admin')); //89
n.set('admin', 999);
console.log("n.get('admin'): " + n.get('admin')); //999
n.set('bob', 90);
var has = n.has('admin');
console.log("has: " + has); // true
javascipt Map Set
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转载自blog.csdn.net/hety119/article/details/90756082
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