如何使用 ES5 解构数组？

Question

Having a hard time converting this line to ES5, hopefully someone can help:

function([i, o]) { return line(i.path(o)); }

The system we're hosting the code on obviously doesn't like destructuring the array as an argument as it's an ES6 feature, but I'm unsure how to convert it down to ES5.

Here's the entire command the line is in:

const link = svg.append("g")
  .attr("stroke", colornone)
  .attr("fill", "none")
  .selectAll("path")
  .data(root.leaves().flatMap(function(leaf) { return leaf.outgoing; }))
  .join("path")
  .style("mix-blend-mode", "multiply")
  .attr("d", function([i, o]) { return line(i.path(o)); }) // <----               
  .each(function(d) { d.path = this; });

Any help would be appreciated!

Answer 1

Replace it with a single variable:

 function( array ) {

and then extract each property one by one.

 var i = array[0];
 var o = array[1];