Tips & Tricks

Convert a number to binary

let base10Number = 10

let base2Number = base10Number.toString('2')

Two Pointer Technique

Two-Pointer Technique -> Use a slow and fast pointer to solve problem

  • Runner Method
    • Two pointers, one tails the front pointer
      • Remove duplicates from sorted array
  • Converge Method
    • Pointer at start, one at end and converge
      • Reverse a string
const swap = (str, a, b) => {
    let temp = str[a]
    str[a] = str[b]
    str[b] = temp
}

const reverse = (str) => {
    let n = str.length
    for (let i = 0; i < n / 2; i++) {
        swap(str, i, (n - i -1 ))
    }
}

Leet Code Sample Problems to solve this

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