39 lines
1.1 KiB
JavaScript
39 lines
1.1 KiB
JavaScript
|
var baseToNumber = require('./_baseToNumber'),
|
||
|
|
baseToString = require('./_baseToString');
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that performs a mathematical operation on two values.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Function} operator The function to perform the operation.
|
||
|
|
* @param {number} [defaultValue] The value used for `undefined` arguments.
|
||
|
|
* @returns {Function} Returns the new mathematical operation function.
|
||
|
|
*/
|
||
|
|
function createMathOperation(operator, defaultValue) {
|
||
|
|
return function(value, other) {
|
||
|
|
var result;
|
||
|
|
if (value === undefined && other === undefined) {
|
||
|
|
return defaultValue;
|
||
|
|
}
|
||
|
|
if (value !== undefined) {
|
||
|
|
result = value;
|
||
|
|
}
|
||
|
|
if (other !== undefined) {
|
||
|
|
if (result === undefined) {
|
||
|
|
return other;
|
||
|
|
}
|
||
|
|
if (typeof value == 'string' || typeof other == 'string') {
|
||
|
|
value = baseToString(value);
|
||
|
|
other = baseToString(other);
|
||
|
|
} else {
|
||
|
|
value = baseToNumber(value);
|
||
|
|
other = baseToNumber(other);
|
||
|
|
}
|
||
|
|
result = operator(value, other);
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = createMathOperation;
|