Remove 'find' polyfill (graphql#2907)

src/execution/values.js

@@ -1,5 +1,3 @@
-import find from '../polyfills/find';
-
 import type { ObjMap } from '../jsutils/ObjMap';
 import keyMap from '../jsutils/keyMap';
 import inspect from '../jsutils/inspect';
@@ -249,12 +247,10 @@ export function getDirectiveValues(
   node: { +directives?: $ReadOnlyArray<DirectiveNode>, ... },
   variableValues?: ?ObjMap<mixed>,
 ): void | { [argument: string]: mixed, ... } {
-  const directiveNode =
-    node.directives &&
-    find(
-      node.directives,
-      (directive) => directive.name.value === directiveDef.name,
-    );
+  // istanbul ignore next (See: 'https://github.com/graphql/graphql-js/issues/2203')
+  const directiveNode = node.directives?.find(
+    (directive) => directive.name.value === directiveDef.name,
+  );
 
   if (directiveNode) {
     return getArgumentValues(directiveDef, directiveNode, variableValues);

src/type/schema.js

@@ -1,4 +1,3 @@
-import find from '../polyfills/find';
 import arrayFrom from '../polyfills/arrayFrom';
 import objectValues from '../polyfills/objectValues';
 import { SYMBOL_TO_STRING_TAG } from '../polyfills/symbols';
@@ -329,7 +328,7 @@ export class GraphQLSchema {
   }
 
   getDirective(name: string): ?GraphQLDirective {
-    return find(this.getDirectives(), (directive) => directive.name === name);
+    return this.getDirectives().find((directive) => directive.name === name);
   }
 
   toConfig(): GraphQLSchemaNormalizedConfig {

src/type/validate.js

@@ -1,4 +1,3 @@
-import find from '../polyfills/find';
 import objectValues from '../polyfills/objectValues';
 
 import inspect from '../jsutils/inspect';
@@ -393,7 +392,7 @@ function validateTypeImplementsInterface(
     // Assert each interface field arg is implemented.
     for (const ifaceArg of ifaceField.args) {
       const argName = ifaceArg.name;
-      const typeArg = find(typeField.args, (arg) => arg.name === argName);
+      const typeArg = typeField.args.find((arg) => arg.name === argName);
 
       // Assert interface field arg exists on object field.
       if (!typeArg) {
@@ -428,7 +427,7 @@ function validateTypeImplementsInterface(
     // Assert additional arguments must not be required.
     for (const typeArg of typeField.args) {
       const argName = typeArg.name;
-      const ifaceArg = find(ifaceField.args, (arg) => arg.name === argName);
+      const ifaceArg = ifaceField.args.find((arg) => arg.name === argName);
       if (!ifaceArg && isRequiredArgument(typeArg)) {
         context.reportError(
           `Object field ${type.name}.${fieldName} includes required argument ${argName} that is missing from the Interface field ${iface.name}.${fieldName}.`,

src/utilities/TypeInfo.js

@@ -1,5 +1,3 @@
-import find from '../polyfills/find';
-
 import type { Visitor } from '../language/visitor';
 import type { ASTNode, ASTKindToNode, FieldNode } from '../language/ast';
 import { Kind } from '../language/kinds';
@@ -204,8 +202,7 @@ export class TypeInfo {
         let argType: mixed;
         const fieldOrDirective = this.getDirective() ?? this.getFieldDef();
         if (fieldOrDirective) {
-          argDef = find(
-            fieldOrDirective.args,
+          argDef = fieldOrDirective.args.find(
             (arg) => arg.name === node.name.value,
           );
           if (argDef) {

src/validation/rules/OverlappingFieldsCanBeMergedRule.js

@@ -1,4 +1,3 @@
-import find from '../../polyfills/find';
 import objectEntries from '../../polyfills/objectEntries';
 
 import type { ObjMap } from '../../jsutils/ObjMap';
@@ -631,8 +630,7 @@ function sameArguments(
     return false;
   }
   return arguments1.every((argument1) => {
-    const argument2 = find(
-      arguments2,
+    const argument2 = arguments2.find(
       (argument) => argument.name.value === argument1.name.value,
     );
     if (!argument2) {