INNER CODE UNIT · TypeScript

hashString

open-source-labs/Chronos · app/containers/GraphsContainer/helpers/index.ts:5

  function hashString(str: string) {
    let hash = 0;
    for (let i = 0; i < str.length; i++) {
      hash = str.charCodeAt(i) + ((hash << 5) - hash);
    }
    let colour = '#';
    for (let i = 0; i < 3; i++) {
      const value = (hash >> (i * 8)) & 0xff;
      colour += `00${value.toString(16)}`.substring(-2);
    }
    return colour;
  }
  function contrastYiq(color: string) {
    const num = parseInt(color.slice(1), 16);
    const r = (num >>> 16) & 0xff;
    const g = (num >>> 8) & 0xff;
    const b = num & 0xff;
    const yiq = (r * 299 + g * 587 + b * 114) / 1000;

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