delphirtl

delphirtl • Docs

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delphirtl / hasFieldOfType

Function: hasFieldOfType()

hasFieldOfType<T>(obj, fieldName, fieldType): obj is Object

Checks that obj is an object, and it has a field named fieldName and that its type is fieldType
Assuming e is an object with the field code of type string.

• If you use this, then the expression following it is valid, for example:
  • hasFieldOfType(e, "code", "string") && e.code === "INSUFFICIENT_FUNDS")
• If you do not use it, then
  • e.code is invalid when checked by code analyzer

Type Parameters

• T

Parameters

• obj: unknown

• fieldName: string

• fieldType: string

Returns

obj is Object

Defined in

src/sysutils.ts:490