lodash Group By
_.groupBy( collection, iteratee )lodash Group By
_.groupBy( collection, iteratee )lodash groupby return array
let arr = [{
"birthdate": "1993",
"name": "Ben"
},
{
"birthdate": "1994",
"name": "John"
},
{
"birthdate": "1995",
"name": "Larry"
},
{
"birthdate": "1995",
"name": "Nicole"
},
{
"birthdate": "1996",
"name": "Jane"
},
{
"birthdate": "1996",
"name": "Janet"
},
{
"birthdate": "1996",
"name": "Dora"
},
];
const res = arr.reduce((ac, a) => {
let temp = ac.find(x => x.birthdate === a.birthdate);
if (!temp) ac.push({ ...a,
name: [a.name]
})
else temp.name.push(a.name)
return ac;
}, [])
console.log(res);lodash groupby return array
export const groupArrayBy = (arr, groupBy) => {
let newArr = []
arr.map((item) => {
if(item[groupBy]) {
let finded = newArr.filter((newItem) => newItem[groupBy] === item[groupBy])
if(finded.length > 0) {
finded[0].products.push(item)
} else {
newArr.push({category: item[groupBy], products: [item]})
}
}
})
return newArr
}lodash groupby return array
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js"></script>lodash map
const _markets_arr = []
_.map(markets, (val, key) => {
val.symbol = key
if (val.buys > 0) {
_markets_arr.push(val)
}
})
console.log(_markets_arr)
//=> [
{ buys: 3, sells: 1, symbol: 'DASH/BTC' },
{ buys: 3, sells: 2, symbol: 'ETH/BTC' }
]Copyright © 2021 Codeinu
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