JavaScript: Hash the input string into a whole number

JavaScript fundamental (ES6 Syntax): Exercise-148 with Solution

Hash String to Whole Number

Write a JavaScript program to hash the input string into a whole number.

• Use String.prototype.split('') and Array.prototype.reduce() to create a hash of the input string, utilizing bit shifting.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2

// Define the sdbm function
const sdbm = str => {
  let arr = str.split('');
  return arr.reduce(
    (hashCode, currentVal) =>
      (hashCode = currentVal.charCodeAt(0) + (hashCode << 6) + (hashCode << 16) - hashCode),
    0
  );
};

// Calculate the hash code for the string 'name'
console.log(sdbm('name')); 

Output:

-3521204949

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-148-1 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that converts an input string to a whole number using a hashing algorithm.
• Write a JavaScript function that computes a numerical hash from a string by iterating over its characters and summing their char codes.
• Write a JavaScript program that generates a consistent hash number for a string and tests for collisions.

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