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Nguyễn Hoàng Nam

@dark_knight_2193

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Cho em hỏi chút điểm khác nhau giữa _.assign / _.extend / _.merge trong Lodash là gì vậy?

Nguyễn Hoàng Nam
Answered Aug 8th, 2017 8:17 AM

_.extend là alias của _.assign, 2 hàm này giống nhau. Điểm khác nhau là _.assign và _.extend sẽ overwrite giá trị undefined, còn _.merge thì không.

_.assign      ({}, { a: 'a'  }, { a: undefined }) // => { a: undefined }
_.merge       ({}, { a: 'a'  }, { a: undefined }) // => { a: "a" }

Nguồn: https://stackoverflow.com/questions/19965844/lodash-difference-between-extend-assign-and-merge

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