// Try this code sample at https://npm.runkit.com/ramda https://medium.com/p/58fa3de25130

Deep copy with ramda.js

// Try this code sample at https://npm.runkit.com/ramda
const ramda = require("ramda")
// Start with a deeply nested array object:
const array = [37, {a: "b"}, {b: {c: "d"}}]
// Make a deep copy with Ramda:
const copy = ramda.clone(array)
console.info(array) // [37, {a: "b"}, {b: {c: "d"}}]
copy[0] = -0 // Change a primitive value (not nested)
copy[1].a = "y" // Change a deeply nested value
copy[2].b.c = "z" // Change another deeply nested value
// Deeply nested objects were actually copied this time:
console.info(array) // [37, {a: "b"}, {b: {c: "d"}}]
// Note how the changes to copy did not affect array:
console.info(copy) // [-0, {a: "y"}, {b: {c: "z"}}]