Iterating over object keys while allowing for empty string

Question

I'm trying to write a function that trims all the values on each value on an object. It is working correctly however when someone adds a few spaces, it is getting saved as "", however I need it to save as "null" In the example above, I need the email field to come back as null when someone adds a input of " ", however it is coming back as ""

contact: {
  firstName: "John"
  lastName: "Smith"
  homePhone: null
  email: ""
}

Object.keys(contact).forEach(
  k =>
(contact[k] =
  typeof contact[k] == 'string'
    ? contact[k].trim()
    : contact[k])
)

? (contact[k].trim() ? contact[k].trim() : null) or ? (contact[k].trim() || null) — epascarello
– epascarello, Commented Nov 17, 2020 at 5:00

Stuart · Accepted Answer · 2020-11-17 05:57:26Z

3

First check it's a string, and if so trim it, and return the trimmed string if it still has length > 0.

let tidy = x => {
    if (typeof x === "string") {
        x = x.trim();
        if (x.length > 0) {
            return x;
        } else {
            return null;
        }
    } 
    return x;
};
Object.keys(contact).forEach(k => contact[k] = tidy(contact[k]));

answered Nov 17, 2020 at 5:57

Stuart

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