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Currying

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`@@ -93,3 +93,23 @@ console.log(twoByTwo); // [[a, b], [b, c], [c, d], [d, e], [e, f], [f, g]]`
`93`	`93`	```
`94`	`94`
`95`	`95`	`<a href="https://codepen.io/Bunlong/pen/JBJWRa" target="_blank">Edit on Codepen</a>`
	`96`	`+`
	`97`	`+## Currying`
	`98`	`+`
	`99`	`+Currying allows a function with multiple arguments to be translated into a sequence of functions. Curried functions can be tailored to match the signature of another function.`
	`100`	`+`
	`101`	+```javascript
	`102`	`+const convertUnits = (toUnit, factor, offset = 0) => input => ((offset + input) * factor).toFixed(2).concat(toUnit);`
	`103`	`+const milesToKm = convertUnits('km', 1.60936, 0);`
	`104`	`+const poundsToKg = convertUnits('kg', 0.45460, 0);`
	`105`	`+const farenheitToCelsius = convertUnits('degrees C', 0.5556, -32);`
	`106`	`+milesToKm(10); // "16.09 km"`
	`107`	`+poundsToKg(2.5); // "1.14 kg"`
	`108`	`+farenheitToCelsius(98); // "36.67 degrees C"`
	`109`	`+`
	`110`	`+const weightsInPounds = [5, 15.4, 9.8, 110];`
	`111`	`+// without currying`
	`112`	`+// const weightsInKg = weightsInPounds.map(x => convertUnits('kg', 0.45460, 0)(x));`
	`113`	`+// with currying`
	`114`	`+const weightsInKg = weightsInPounds.map(poundsToKg); // 2.27kg, 7.00kg, 4.46kg, 50.01kg`
	`115`	+```

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