[英]how to pass only keys and its values as parameter of javascript object
[英]How to access an object with no keys, only values javascript
var hasDuplicates = "eyes";
var noDuplicates = new Set(hasDuplicates); // {"e", "y", "s"}
console.log(Object.keys(noDuplicates)); // []
console.log(Object.values(noDuplicates)); // []
我基本上想访问名为“noDuplicates”的集合的“e”、“y”和“s”。
var setToArray = [];
for (spot in noDuplicates) {
setToArray.push(Object.keys(noDuplicates)[spot])
}
您可以使用数组扩展语法将Set转换为数组:
var hasDuplicates = "eyes"; var noDuplicates = new Set(hasDuplicates); // {"e", "y", "s"} var setToArray = [...noDuplicates]; console.log(setToArray);
您还可以使用Set.forEach()
或for ... of循环直接访问Set的值:
var hasDuplicates = "eyes"; var noDuplicates = new Set(hasDuplicates); // {"e", "y", "s"} noDuplicates.forEach(v => console.log(v)); for(const v of noDuplicates) { console.log(v); }
noDuplicates
是一个提供迭代器的Set。 只需使用for...of
或扩展运算符[... noDuplicates]
而不是for...in
。 更好的是,使用Array.from
将您的集合直接转换为数组:
let setToArray = Array.from(new Set([1, 1, 1, 2, 2])); console.log(setToArray);
您还可以使用Array.from()方法在Set和Array之间进行转换:
var hasDuplicates = "eyes"; var noDuplicates = new Set(hasDuplicates); var setToArray = Array.from(noDuplicates); console.log(setToArray);
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