Is there a way to set default parameters for multiple function without have to copy paste it

Question

I have multiple function with the same default parameters for all of it.

Is there somehow to add default parameters for all of it without copying and paste?

// 1st function
export function modify(id, values, failCB = (err) => error("🚫 Error"), successCB = () => success("✌ Success")) {
    //...
    if (err) {
        failCB(err.message);
    } else {
        successCB()
    }
}

// 2nd function
export function remove(id, failCB = (err) => error("🚫 Error"), successCB = () => success("✌ Success")) {
    //...
    if (err) {
        failCB(err.message);
    } else {
        successCB()
    }
};

shrihankp · Accepted Answer · 2021-01-30 15:07:17Z

1

You can declare variables that store the default value of the parameters and refer those variables instead:

const defaultCbIfFailed = err => error("🚫 Error");
const defaultCbIfSuccess = () => success("✌ Success");

//1st function
export function modify(id, values, failCB = defaultCbIfFailed, successCB = defaultCbIfSuccess) {
    //...
    if (err) {
        failCB(err.message);
    } else {
        successCB()
    }
}

// 2nd function
export function remove(id, failCB = defaultCbIfFailed, successCB = defaultCbIfSuccess) {
    //...
    if (err) {
        failCB(err.message);
    } else {
        successCB()
    }
};

answered Jan 30, 2021 at 15:07

shrihankp

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Comments

Randy Casburn · Accepted Answer · 2021-01-30 15:04:18Z

1

Use function declarations for your callbacks and pass references to those:

// 1st function
export function modify(id, values, failCB, successCB) {
    //...
    if (err) {
        failCB(err.message);
    } else {
        successCB()
    }
}

// 2nd function
export function remove(id, values, failCB, successCB) {
    //...
    if (err) {
        failCB(err.message);
    } else {
        successCB()
    }
};

function failCB = (err) => error("🚫 Error")
function successCB = () => success("✌ Success")

answered Jan 30, 2021 at 15:04

Randy Casburn

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Comments

Gr4y · Accepted Answer · 2021-01-30 15:25:10Z

0

I knew what Shrihan answered. What I actually want is something like this

removeSubject.parameters = failCB;

answered Jan 30, 2021 at 15:25

Gr4y

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