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slice vs splice, map, filter, reduce, forEach, find, some, every, includes, sort, reverse, and array destructuring

Modern array work relies on iteration helpers, search helpers, and knowing which methods mutate the original array.

JavaScript Medium Theory

slice vs splice, map, filter, reduce, forEach, find, some, every, includes, sort, reverse, and array destructuring

Modern array work relies on iteration helpers, search helpers, and knowing which methods mutate the original array.

  • `slice` copies, `splice` mutates
  • `map` transforms and `forEach` does not return a new array
  • `sort` mutates unless you copy first
#arrays #javascript #methods

slice vs splice, map, filter, reduce, forEach, find, some, every, includes, sort, reverse, and array destructuring