fix: simplified map+flat

src/vs/base/common/lifecycle.ts

@@ -103,8 +103,7 @@ export class DisposableTracker implements IDisposableTracker {
 
 		const leaking = [...this.livingDisposables.entries()]
 			.filter(([, v]) => v.source !== null && !this.getRootParent(v, rootParentCache).isSingleton)
-			.map(([k]) => k)
-			.flat();
+			.flatMap(([k]) => k);
 
 		return leaking;
 	}

src/vs/workbench/api/browser/mainThreadNotebookKernels.ts

@@ -43,7 +43,7 @@ abstract class MainThreadKernel implements INotebookKernel {
 	}
 
 	public get preloadProvides() {
-		return this.preloads.map(p => p.provides).flat();
+		return this.preloads.flatMap(p => p.provides);
 	}
 
 	constructor(data: INotebookKernelDto2, private _languageService: ILanguageService) {

src/vs/workbench/contrib/bulkEdit/browser/bulkFileEdits.ts

@@ -52,7 +52,7 @@ class RenameOperation implements IFileOperation {
 	) { }
 
 	get uris() {
-		return this._edits.map(edit => [edit.newUri, edit.oldUri]).flat();
+		return this._edits.flatMap(edit => [edit.newUri, edit.oldUri]);
 	}
 
 	async perform(token: CancellationToken): Promise<IFileOperation> {
@@ -106,7 +106,7 @@ class CopyOperation implements IFileOperation {
 	) { }
 
 	get uris() {
-		return this._edits.map(edit => [edit.newUri, edit.oldUri]).flat();
+		return this._edits.flatMap(edit => [edit.newUri, edit.oldUri]);
 	}
 
 	async perform(token: CancellationToken): Promise<IFileOperation> {
@@ -297,7 +297,7 @@ class FileUndoRedoElement implements IWorkspaceUndoRedoElement {
 		readonly operations: IFileOperation[],
 		readonly confirmBeforeUndo: boolean
 	) {
-		this.resources = operations.map(op => op.uris).flat();
+		this.resources = operations.flatMap(op => op.uris);
 	}
 
 	async undo(): Promise<void> {

src/vs/workbench/contrib/codeActions/browser/codeActionsContribution.ts

@@ -74,7 +74,7 @@ export class CodeActionsContribution extends Disposable implements IWorkbenchCon
 		super();
 
 		codeActionsExtensionPoint.setHandler(extensionPoints => {
-			this._contributedCodeActions = extensionPoints.map(x => x.value).flat();
+			this._contributedCodeActions = extensionPoints.flatMap(x => x.value);
 			this.updateConfigurationSchema(this._contributedCodeActions);
 			this._onDidChangeContributions.fire();
 		});
@@ -143,7 +143,7 @@ export class CodeActionsContribution extends Disposable implements IWorkbenchCon
 		};
 
 		const getActions = (ofKind: CodeActionKind): ContributedCodeAction[] => {
-			const allActions = this._contributedCodeActions.map(desc => desc.actions).flat();
+			const allActions = this._contributedCodeActions.flatMap(desc => desc.actions);
 
 			const out = new Map<string, ContributedCodeAction>();
 			for (const action of allActions) {

src/vs/workbench/services/aiRelatedInformation/common/aiRelatedInformationService.ts

@@ -91,8 +91,7 @@ export class AiRelatedInformationService implements IAiRelatedInformationService
 			}
 			const result = results
 				.filter(r => r.status === 'fulfilled')
-				.map(r => (r as PromiseFulfilledResult<RelatedInformationResult[]>).value)
-				.flat();
+				.flatMap(r => (r as PromiseFulfilledResult<RelatedInformationResult[]>).value);
 			return result;
 		} finally {
 			stopwatch.stop();