default-to

v0.9.6

STATUS

Passing

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VISIBILITY

Public

PUBLISHED

5 years ago

SIZE

806 B

Returns the second argument if it is not `null`, `undefined` or `NaN`; otherwise the first argument is returned.

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defaultTo (

default:a,

val:b

) : *

Returns the second argument if it is not null, undefined or NaN; otherwise the first argument is returned.

Example

const defaultTo42 = R.defaultTo(42);

     defaultTo42(null);  //=> 42
     defaultTo42(undefined);  //=> 42
     defaultTo42(false);  //=> false
     defaultTo42('Ramda');  //=> 'Ramda'
     // parseInt('string') results in NaN
     defaultTo42(parseInt('string')); //=> 42

Arguments

default: a

The default value.

val: b

val will be returned instead of default unless val is null, undefined or NaN.

Returns

*

The second value if it is not `null`, `undefined` or `NaN`, otherwise the default value