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📄 isArrayMethodCallWithPredicate.ts

📊 Analysis Summary

Metric	Count
🔧 Functions	1
📦 Imports	6
📊 Variables & Constants	1

📚 Table of Contents

• Imports
• Variables & Constants
• Functions

🛠️ File Location:

📂 packages/eslint-plugin/src/util/isArrayMethodCallWithPredicate.ts

📦 Imports

Name	Source
ParserServicesWithTypeInformation	@typescript-eslint/utils
TSESTree	@typescript-eslint/utils
RuleContext	@typescript-eslint/utils/ts-eslint
getConstrainedTypeAtLocation	@typescript-eslint/type-utils
AST_NODE_TYPES	@typescript-eslint/utils
getStaticMemberAccessValue	./misc

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Variables & Constants

Name	Type	Kind	Value	Exported
ARRAY_PREDICATE_FUNCTIONS	Set<unknown>	const	`new Set([
'every',
'filter',
'find',
'findIndex',
'findLast',
'findLastIndex',
'some',
])`	✗

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Functions

isArrayMethodCallWithPredicate(context: RuleContext<string, unknown[]>, services: ParserServicesWithTypeInformation, node: TSESTree.CallExpression): boolean

Code

export function isArrayMethodCallWithPredicate(
  context: RuleContext<string, unknown[]>,
  services: ParserServicesWithTypeInformation,
  node: TSESTree.CallExpression,
): boolean {
  if (node.callee.type !== AST_NODE_TYPES.MemberExpression) {
    return false;
  }

  const staticAccessValue = getStaticMemberAccessValue(node.callee, context);

  if (!ARRAY_PREDICATE_FUNCTIONS.has(staticAccessValue)) {
    return false;
  }

  const checker = services.program.getTypeChecker();
  const type = getConstrainedTypeAtLocation(services, node.callee.object);
  return tsutils
    .unionConstituents(type)
    .flatMap(part => tsutils.intersectionConstituents(part))
    .some(t => checker.isArrayType(t) || checker.isTupleType(t));
}

• Parameters:
• context: RuleContext<string, unknown[]>
• services: ParserServicesWithTypeInformation
• node: TSESTree.CallExpression
• Return Type: boolean
• Calls:
• getStaticMemberAccessValue (from ./misc)
• ARRAY_PREDICATE_FUNCTIONS.has
• services.program.getTypeChecker
• getConstrainedTypeAtLocation (from @typescript-eslint/type-utils)
• tsutils .unionConstituents(type) .flatMap(part => tsutils.intersectionConstituents(part)) .some
• checker.isArrayType
• checker.isTupleType

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