1. Three arrays
[1Jing 2 code 3], [4 Jing 5], [6 Jing 7]
expands into
145147156157246
2. Array objects
[{name:"a",children: [{name:"a-1"}]}, {name:"b",children: [{name:"b-1"}]}]
expand to
[{name:"a"}, {name:"a-1"}, {name:"b-1"}]
the first one on GitHub seems to have the same function (nothing to do with reduce , but the logic is the same): https://github.com/Jiasm/note.
the second operation looks like this, if you have to use reduce :
const a = (1, 2, 3, 4, 5) // a === 5so what your code means is to put the element in an array and then return the array, and you can simply understand that line of expression as code like this:
results.push(XXX)
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