A single element in an array, a string labeled "magically," mysteriously transforms into a standalone string

Question

A single element in an array, a string labeled "magically," mysteriously transforms into a standalone string

Uncertain of the reason for this issue. In this part of my code, these arrays might contain only a single element.

actualAnswer = actualAnswer.split(" ");
playerAnswer = playerAnswer.split(" ");

Next, I put them through this function.

function checkForPlural(playerAnswer, actualAnswer){

var answerObject = {playerAnswer: playerAnswer,
                    actualAnswer: actualAnswer};

for (var answerWord in actualAnswer){
    if (actualAnswer[answerWord].slice(-1) == "S")
    {
            answerObject.actualAnswer[answerWord] = actualAnswer[answerWord].substring(0, actualAnswer[answerWord].length - 1);
    }
}
for (var answerWord in playerAnswer){
    if (playerAnswer[answerWord].slice(-1) == "S")
    {
            answerObject.playerAnswer[answerWord] = playerAnswer[answerWord].substring(0, playerAnswer[answerWord].length - 1);
    }
}
}

Upon returning the object, if the passed arrays had just one element, Javascript interprets them as strings. Therefore, using answerObject.actualAnswer.length would provide the length of the string instead of 1.

Link to the functioning Plunker: https://plnkr.co/edit/nIqq3VdjjMa2GDWyqkxx

UPDATE: Found that the issue was actually in an earlier part of my code. Apologies!

javascript arrays function types

Answer 1

Answer №1

To transform elements in an array, utilize Array.prototype.map(). Use String.prototype.replace() to replace the last character "S" in a string if present. Return an object with properties assigned to function parameter identifiers.

const pattern = /S$/;
const replacement = "";

function modifyElements(array, pattern_, replacement_) {
  return array.map(function(element) {return element.replace(pattern_, replacement_)})
}

function analyzePlurals(userInput, correctAnswer) {
  return {
    userInput: modifyElements(userInput, pattern, replacement),
    correctAnswer: modifyElements(correctAnswer, pattern, replacement)
  }
}

console.log(analyzePlurals("abc defS ghi".split(" "), "12S 456 78S".split(" ")))

Answer 2

To transform elements in an array, utilize Array.prototype.map(). Use String.prototype.replace() to replace the last character "S" in a string if present. Return an object with properties assigned to function parameter identifiers.

const pattern = /S$/;
const replacement = "";

function modifyElements(array, pattern_, replacement_) {
  return array.map(function(element) {return element.replace(pattern_, replacement_)})
}

function analyzePlurals(userInput, correctAnswer) {
  return {
    userInput: modifyElements(userInput, pattern, replacement),
    correctAnswer: modifyElements(correctAnswer, pattern, replacement)
  }
}

console.log(analyzePlurals("abc defS ghi".split(" "), "12S 456 78S".split(" ")))

Answer 3

Answer №2

Everything appears to be functioning properly, the unexpected transformation occurred as a result of a flaw in a separate function that was replacing the array with a string. Apologies for the confusion.

Answer 4

Everything appears to be functioning properly, the unexpected transformation occurred as a result of a flaw in a separate function that was replacing the array with a string. Apologies for the confusion.

A single element in an array, a string labeled "magically," mysteriously transforms into a standalone string

Answer №1

Answer №2

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