Gets the value of an objects key, and falls back to a default value.
let getKeyOrDefault = require('get-key-or-default');
// An object without a key
getKeyOrDefault({color: 'blue'}, 'height', 32);
// 32
// An object with a key
getKeyOrDefault({color: 'blue', height: 12}, 'height', 32);
// 12
// No object
getKeyOrDefault(undefined, 'height', 32);
// 32
// Validation
getKeyOrDefault({color: 'blue', height: 'twelve'}, 'height', 32, Number.isInteger);
// 32$ npm install get-key-or-default
var getKeyOrDefault = require('get-key-or-default');| Type | Data Type | Name | Description |
|---|---|---|---|
| parameter | object | source | The object containing the key value. |
| parameter | string/number | key | The key that contains the value. |
| parameter | * | defaultValue | The result if the value is not found, or not valid. |
| parameter | function | isValidCallback | Evaluates if a value provided is valid. |
| returns | * | n/a | The source objects key value, otherwise the default value |
The validation callback is fired when a defined value is evaluated.
| Type | Data Type | Name | Description |
|---|---|---|---|
| parameter | !undefined | value | The value that is being validated. |
| returns | boolean | n/a | True if the value is valid, otherwise false. |
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