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Editor to share with you how to use JavaScript expansion operation to match and join objects and object arrays, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Use unfold operations to match union objects and object arrays

Object merging is a common thing, and we can use the new ES6 features to handle the merging process better and more succinctly.

/ / merging objectsconst product = {name: 'Milk', packaging:' Plastic', price:'5 $'} const manufacturer = {name: 'Company Name', address:' The Company Address'} const productManufacturer = {... product,... manufacturer}; console.log (productManufacturer) / / outputs {name: "Company Name", packaging: "Plastic", price: "5 $", address: "The Company Address"} / / merging an array of objects into oneconst cities = [{name: 'Paris', visited:' no'}, {name: 'Lyon', visited:' no'}, {name: 'Marseille', visited:' yes'}, {name: 'Rome', visited:' yes'}, {name: 'Milan' Visited: 'no'}, {name:' Palermo', visited: 'yes'}, {name:' Genoa', visited: 'yes'}, {name:' Berlin', visited: 'no'}, {name:' Hamburg', visited: 'yes'}, {name:' New York', visited: 'yes'}] Const result = cities.reduce ((accumulator, item) = > {return {... accumulator, [item.name]: item.visited}}, {}); console.log (result) / * outputsBerlin: "no" Genoa: "yes" Hamburg: "yes" Lyon: "no" Marseille: "yes" Milan: "no" New York: "yes" Palermo: "yes" Paris: "no" Rome: "yes" * / above is all the content of the article "how JavaScript uses unfold operations to match objects and object arrays". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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