Element implicitly has an 'any' type because type 'Map<String, DayConsumptionDto[]>' has no index signature

Question

I'm stucked with this issue and I didn't find any solution even if there is a lot of question around this error, in my case I have a Map and I coudn't apply the solutions.

Here is my code :

I have to convert a map to send to the back-end like this :

const convMap = {} as Map<String, Array<DayConsumptionDto>>; map.forEach((val: Array<DayConsumptionDto>, key: string) => { convMap[key] = val; });

I'm getting this Error :

Element implicitly has an 'any' type because type 'Map<String, DayConsumptionDto[]>' has no index signature. Did you mean to call 'convMap.set'?

if I put const convMap = {} as any it works perfectly but I don't do that, can you please help me to fix it ?

same as convMap, I have just to convert it to and array of key values to be sent to the back, so let map = new Map<string, DayConsumptionDto[]>(); — Sofiane
– Sofiane, Commented Apr 8, 2022 at 9:25

alin0509 · Accepted Answer · 2022-04-08 09:42:29Z

you can try like this

const convMap:{[key:string]:Array<DayConsumptionDto>}[] = [] map.forEach((val: Array<DayConsumptionDto>, key: string) => { convMap[key] = val; });

this will create an array

or

const convMap= {} as {[key:string]:Array<DayConsumptionDto>}; map.forEach((val: Array<DayConsumptionDto>, key: string) => { convMap[key] = val; });

this will create an object

Thanks a lot dude ! Worked perfectly with the second one because I'm using an Object.

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