Is there a way for me to differentiate between numbers and words (elements in quotes) within an array?

Here's the scenario: I have an array named this.someArray.

this.someArray = ["Word", "123", "456"]

The content of this.someArray is generated dynamically, so the elements are not hardcoded.

My goal is to convert all numeric items into actual numbers (excluding words):

["Word", 123, 456]

To achieve this task, these are the steps I've come up with:

  1. Determine whether each element in the array is a word or number

To accomplish this, I've created a function:

isNumber(number) { 
    return !isNaN(parseFloat(number)) && !isNaN(number-0) 
}
  1. Use a forEach loop to check if each element is a word or number

    this.someArray.forEach(element => { this.isNumber(element) });

  2. Implement an if statement (if the element in this.someArray is a number, then remove the quotes)

However, I am unsure about the correctness of step 2 and uncertain about how to proceed with step 3.

Is there a way to achieve this?

Additional information:

This is what the dynamically generated array looks like:

https://i.sstatic.net/CgcFN.png

And here is the code responsible for generating the array:

this.someArray = this.biggerArray.map((n) => {
    const data = [];
    for (var key of Object.keys(n)) {
        data.push(n[key].data);
    }
    return data;
});

Answer №1

In my opinion, using a simple .map function would be more straightforward - first, we check if the string is comprised solely of digits using a regular expression, and then we convert it to a number by calling the Number method:

const items = ["Apple", "234", "567"];
const updatedItems = items.map(
  item => /^\d+$/.test(item) ? Number(item) : item
);
console.log(updatedItems);

The regex pattern ^\d+$ is broken down as follows:

  • ^ - start of the string
  • \d+ - one or more digits
  • $ - end of the string

If the numbers may contain decimals, we can modify the regex to include an optional decimal part:

const items = ["Apple", "234", "567", '12.45'];
const updatedItems = items.map(
  item => /^\d+(?:\.\d+)?$/.test(item) ? Number(item) : item
);
console.log(updatedItems);

Even for the array ['Banana', '1289'], this logic still functions correctly:

const items = ['Banana', '1289'];
const updatedItems = items.map(
  item => /^\d+(?:\.\d+)?$/.test(item) ? Number(item) : item
);
console.log(updatedItems);

Answer №2

This method can also be applied to decimal numbers enclosed in quotation marks.

for (let i in someArray) {
    if (parseFloat(someArray[i])) {
        someArray[i] = parseFloat(someArray[i]);
    }
}

This presents a more concise approach.

for (let i in someArray) {
    parseFloat(someArray[i]) && (someArray[i] = parseFloat(someArray[i]));
}

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