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How to get arrays intersection include duplicate values at node

array data manupilation data structure lodash node duplicate intersection intersect

Prerequisites There are two arrays has multiple elements as below. array1 is [ { "mail": "shinchi@its-all-writing.com", "hobby": "Walking" }, { "mail": "shinchi@its-all-writing.com", "hobby": "Playing the Bamboo Flute" }, { "mail": "kazuyo…

How to implement multiple key's group by at node

node lodash groupBy multiple multiple group by data structure data manupilation

Prerequisites There are arrays has multiple elements as below. [ { "name": "SHINCHI, Takahiro", "mail": "shinchi@its-all-writing.com", "hobby": "Walking" }, { "name": "SHINCHI, Takahiro", "mail": "shinchi.xx@gmail.com", "hobby": "Playing t…