Iterate over elements within an array at a specific position

Question

Iterate over elements within an array at a specific position

I'm in the process of developing a JavaScript function that takes a value passed from a servlet, then searches an array to find the index of that value. The loop will then start at that index and continue until it reaches the last value of the array, at which point it will restart from the beginning of the array. Below is the code for my function:

function Calculate(servletValue){
     var calculateArray = [0.000001, 0.000003, 0.00001, 0.00003, 0.0001, 0.0003, 0.001, 0.003, 0.01, 0.03, 0.1, 0.3];
     var index = calculateArray.indexOf(servletValue);
     for(i = 0; i<calculateArray.length; i++){
     console.log(calculateArray[i]);
   }
}

Thank you in advance for any assistance!

javascript arrays

Answer 1

Answer №1

Here is a possible code snippet that accomplishes the task:

const reorganizeArray = (value, array) => {
  const index = array.indexOf(value);
  const pivot = index < 0 ? 0 : index;
  return [...array.slice(pivot), ...array.slice(0, pivot)];
}

console.log(
  reorganizeArray(0.003, [0.000001, 0.000003, 0.00001, 0.00003, 0.0001, 0.0003, 0.001, 0.003, 0.01, 0.03, 0.1, 0.3])
)

If the value is not found in the array, the function acts as a no-op. Otherwise, it returns a new array by slicing the original one from the index to the end and then from the beginning to the index.

Answer 2

Here is a possible code snippet that accomplishes the task:

const reorganizeArray = (value, array) => {
  const index = array.indexOf(value);
  const pivot = index < 0 ? 0 : index;
  return [...array.slice(pivot), ...array.slice(0, pivot)];
}

console.log(
  reorganizeArray(0.003, [0.000001, 0.000003, 0.00001, 0.00003, 0.0001, 0.0003, 0.001, 0.003, 0.01, 0.03, 0.1, 0.3])
)

If the value is not found in the array, the function acts as a no-op. Otherwise, it returns a new array by slicing the original one from the index to the end and then from the beginning to the index.

Answer 3

Answer №2

To simplify the process, I suggest creating a fresh array and iterating through it. Here's an example:

function Process(inputValue){
     var newArr = [0.000001, 0.000003, 0.00001, 0.00003, 0.0001, 0.0003, 0.001, 0.003, 0.01, 0.03, 0.1, 0.3];
     var index = newArr.indexOf(inputValue);
     const myArray = [...newArr.slice(index, newArr.length), ...newArr.slice(0, index)] // consider using a descriptive name 
     // iterate through myArray here...
   }
}

Answer 4

To simplify the process, I suggest creating a fresh array and iterating through it. Here's an example:

function Process(inputValue){
     var newArr = [0.000001, 0.000003, 0.00001, 0.00003, 0.0001, 0.0003, 0.001, 0.003, 0.01, 0.03, 0.1, 0.3];
     var index = newArr.indexOf(inputValue);
     const myArray = [...newArr.slice(index, newArr.length), ...newArr.slice(0, index)] // consider using a descriptive name 
     // iterate through myArray here...
   }
}

Iterate over elements within an array at a specific position

Answer №1

Answer №2

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