declare class Denque<T = any> {
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length: number;
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constructor();
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constructor(array: T[]);
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constructor(array: T[], options: IDenqueOptions);
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push(item: T): number;
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unshift(item: T): number;
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pop(): T | undefined;
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shift(): T | undefined;
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peekBack(): T | undefined;
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peekFront(): T | undefined;
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peekAt(index: number): T | undefined;
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get(index: number): T | undefined;
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remove(index: number, count: number): T[];
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removeOne(index: number): T | undefined;
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splice(index: number, count: number, ...item: T[]): T[] | undefined;
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isEmpty(): boolean;
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clear(): void;
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size(): number;
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toString(): string;
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toArray(): T[];
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}
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interface IDenqueOptions {
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capacity?: number
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}
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export = Denque;
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