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JavaScript program to generate all rotations of numbers

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Release: 2023-09-10 19:17:02
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JavaScript 程序生成数字的所有旋转

We will generate all rotations of numbers in JavaScript by converting the number to a string, then rotating the characters of the string, and finally converting it back to a number. This process repeats with every spin. We will keep repeating this process until all possible rotations of the given number are generated. This program will allow us to efficiently generate all rotations of numbers and will be useful for various mathematical calculations.

method

The way to generate all rotations of a number in JavaScript is to convert the number to a string, split it into an array of characters, then use a loop to iterate over the array and move the first character to the end of the array on each iteration . The rotated array can be rejoined to form a string and then converted back to a number. Repeat the process to get the desired number of spins. This is the explanation -

  • Convert a number to a string to allow string operations.

  • Use the split method to split a string into a character array.

  • Initialize the loop to run the desired number of spins.

  • On each iteration, use the shift and push array methods to move the first character of the array to the end.

  • Use the join method to join the rotated array back to a string.

  • Convert the string back to a number and store it in an array to collect all rotations.

Example

This is a JavaScript program that generates all rotations of a given number -

function generateRotations(num) {
   let numStr = num.toString();
   let rotations = [];
     
   for (let i = 0; i < numStr.length; i++) {
      numStr = numStr.slice(1) + numStr[0];
      rotations.push(parseInt(numStr));
   }
     
   return rotations;
}
console.log(generateRotations(123));
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illustrate

  • generateRotationsThe function accepts a number as a parameter.

  • The number will be converted to a string and stored in the numStr variable.

  • The for loop is used to generate all rotations of the number. The loop runs numStr.length times, equal to the number of digits in the number.

  • On each iteration of the loop, the first number of numStr will be removed and added to the end of the string. This will create a new rotated version of the number.

  • The new rotation number is then parsed back to an integer and added to the array rotations.

  • After all rotations have been generated, an array of rotations will be returned as the result.

  • Test the code by calling the generateRotations function with the number 123 and printing the result to the console.

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source:tutorialspoint.com
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