To use the map
function in lodash with TypeScript, you can follow these steps:
Install lodash: npm install lodash
Import the map
function from lodash in your TypeScript file:
index.ts30 chars2 lines
map
function:index.ts232 chars13 lines
In this example, we have an array of users and we want to map it to an array of their names. We pass a callback function that takes a User
object as input and returns a string
as output.
Note that we don't need to specify the type of the callback
parameter explicitly in this case, since TypeScript can infer it from the type of the users
array. However, if you were passing an arrow function instead, you would need to specify the types explicitly:
index.ts57 chars2 lines
index.ts245 chars13 lines
In this example, we use the Array<string>
syntax to specify the type of the returned array, and we also use the User
and string
type parameters to indicate the type of the input array and the output array respectively.
gistlibby LogSnag