A
arktype•4mo ago
OnkelTem

Minimal array length - how to?

This page https://arktype.io/docs/objects#arrays says one can use [] > 1 to constrain minimal array length. However, this doesn't work: 
import {type} from 'arktype'

export const config$ = type(
  {
    env: 'string>0'
  },
  '[] > 1'
)
import {type} from 'arktype'

export const config$ = type(
  {
    env: 'string>0'
  },
  '[] > 1'
)
ERROR: 
No overload matches this call.
  Overload 1 of 3, '(params: `<${string}>`, def: "string" | "number" | "bigint" | "boolean" | "symbol" | "undefined" | "object" | "Key" | "Record" | "Date" | "Array" | "false" | "never" | "null" | "true" | ... 25 more ... | "Merge"): Generic<...>', gave the following error.
    Argument of type '{ env: string; }' is not assignable to parameter of type '`<${string}>`'.
  Overload 2 of 3, '(_0: validateObjectLiteral<{ readonly env: "string>0"; }, {}, bindThis<{ readonly env: "string>0"; }>>, _1: ArgTwoOperator): Type<...>', gave the following error.
    Argument of type '"[] > 1"' is not assignable to parameter of type 'ArgTwoOperator'.(2769)
No overload matches this call.
  Overload 1 of 3, '(params: `<${string}>`, def: "string" | "number" | "bigint" | "boolean" | "symbol" | "undefined" | "object" | "Key" | "Record" | "Date" | "Array" | "false" | "never" | "null" | "true" | ... 25 more ... | "Merge"): Generic<...>', gave the following error.
    Argument of type '{ env: string; }' is not assignable to parameter of type '`<${string}>`'.
  Overload 2 of 3, '(_0: validateObjectLiteral<{ readonly env: "string>0"; }, {}, bindThis<{ readonly env: "string>0"; }>>, _1: ArgTwoOperator): Type<...>', gave the following error.
    Argument of type '"[] > 1"' is not assignable to parameter of type 'ArgTwoOperator'.(2769)
ArkType
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3 Replies
OnkelTem
OnkelTemOP•4mo ago
TizzySaurus
TizzySaurus•4mo ago
There should be a .atLeastLength (or similar) that you can use type(obj, '[]').atLeastLength(2)
OnkelTem
OnkelTemOP•4mo ago
Thanks @TizzySaurus !

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