Assignment: failsafe callback

Provide a function failSafe that - in curried style - takes:

a default value
a callback function
an argument to the callback function that returns whatever the callback function returns given its argument or the default value if the callback function throws an Error.

💡

Note: see how the tests make use of failSafe.

Solution

const failSafe = defaultValue => callback => argument => {
    try {
        return callback(argument);
    } catch (error) {
        return defaultValue;
    }
};

Your solution will be tested against:

const doError = x => {
    throw new Error()
};
const errorCount = failSafe(1)(doError);
 
failSafe(false)(x => x)(true) && failSafe(true)(doError)(null) && errorCount(null) === 1

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