扩展语法的替代方法 [英] Alternatives of spread syntax

问题描述

我看到扩展语法的几种用法在一个代码中.例如:

I see several uses of spread syntax in a code. For example:

function tree2table(tree) {
    var children = tree["children"];
    if (children === undefined) return [];
    var result = [];
    for (var i = 0; i < children.length; i++) {
        var child = children[i];
        var link = [child["name"], tree["name"], child["size"]];
        result.push(link);
        result.push(...tree2table(child))
    }
    return result
}

但是，IE不支持传播语法.有谁知道改变result.push(...tree2table(child))使其像跨浏览器一样高效的最佳方法是什么?

However, spread syntax is not supported in IE. Does anyone know what is the best way to change result.push(...tree2table(child)) such that it becomes cross-browser and as efficient as before?

推荐答案

Differenz

Array.prototype.push.apply(result, values) 修改而不是复制数组

Differenz

Array.prototype.push.apply(result, values) modifies instead of making a copy of an array

const result = []
const values = ['a', 'b']
Array.prototype.push.apply(result, values)
console.log(result)

function tree2table(tree) {
  var children = tree["children"];
  if (children === undefined) return [];
  var result = [];
  for (var i = 0; i < children.length; i++) {
    var child = children[i];
    var link = [child["name"], tree["name"], child["size"]];
    result.push(link);
    Array.prototype.push.apply(result, tree2table(child))
  }
  return result
}

兼容

基于版本信息

以下文档模式支持:怪癖，Internet Explorer 6标准，Internet Explorer 7标准，Internet Explorer 8标准，Internet Explorer 9标准，Internet Explorer 10标准，Internet Explorer 11标准.

Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards.

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