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Javascript – JS how to use variable value instead of variable point itself

Here is my easy code. I want to the two function get different result, but the global variable precision passed is the pointer. So it get same result for two function.

precision = 4
func = (value) => value.toFixed(precision)
precision = 2
func2 = (value) => value.toFixed(precision)
console.log(func(2.3333))
console.log(func2(2.3333))

Can anyone tell me how to use the value of precision instead of itself? Then the two function should return different result.

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2

Answers


  1. 0

    To use a different value for precision for each function call, pass the precision as function argument. This will eliminate the need for a second function:

    const fixedNumber = (value, precision) => value.toFixed(precision);

console.log(fixedNumber(2.333, 2));
console.log(fixedNumber(2.333, 3));

    As can be seen from the output of your example, set function will read the value when it is called and not when it was defined.

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  2. 0

    You could take a closure over precision and get a function for the value.

    const
    fix = precision => value => value.toFixed(precision),
    fix4 = fix(4),
    fix2 = fix(2);

console.log(fix2(2.3333));
console.log(fix4(2.3333));
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