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`@@ -215,5 +215,26 @@ let DrinkTotal = cart.filter(x => x.name === "Drink")`
`215`	`215`	`.map(x => x.price)`
`216`	`216`	`.reduce((t, v) => t += v)`
`217`	`217`	`.toFixed(2);`
	`218`	`+`
`218`	`219`	`console.log(Total Drink Cost $${drinkTotal}); // Total Drink Cost 14ドル.13`
`219`	`220`	```
	`221`	`+`
	`222`	`+## Pipelines`
	`223`	`+`
	`224`	`+A pipeline allows for easy function composition when performing multiple operations on a variable. Since JavaScript lacks a Pipeline operator, a design pattern can be used to accomplish the task.`
	`225`	`+`
	`226`	+```javascript
	`227`	`+const pipe = functions => data => {`
	`228`	`+ return functions.reduce(`
	`229`	`+ (value, func) => func(value),`
	`230`	`+ data`
	`231`	`+ );`
	`232`	`+};`
	`233`	`+let cart = [3.12, 45.15, 11.01];`
	`234`	`+const addSalesTax = (total, taxRate) => (total * taxRate) + total;`
	`235`	`+const tally = orders => pipe([`
	`236`	`+ x => x.reduce((total, val) => total + val), // sum the order`
	`237`	`+ x => addSalesTax(x, 0.09),`
	`238`	+ x => `Order Total = ${x.toFixed(2)}` // convert to text
	`239`	`+])(orders); // Order Total = 64.62`
	`240`	+```

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