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import { ObjectLiteral } from "../common/ObjectLiteral";
export declare class OrmUtils {
/**
* Chunks array into pieces.
*/
static chunk<T>(array: T[], size: number): T[][];
static splitClassesAndStrings<T>(classesAndStrings: (string | T)[]): [T[], string[]];
static groupBy<T, R>(array: T[], propertyCallback: (item: T) => R): {
id: R;
items: T[];
}[];
static uniq<T>(array: T[], criteria?: (item: T) => any): T[];
static uniq<T, K extends keyof T>(array: T[], property: K): T[];
private static isPlainObject;
private static mergeArrayKey;
private static mergeObjectKey;
private static merge;
/**
* Deep Object.assign.
*/
static mergeDeep(target: any, ...sources: any[]): any;
/**
* Deep compare objects.
*
* @see http://stackoverflow.com/a/1144249
*/
static deepCompare(...args: any[]): boolean;
/**
* Gets deeper value of object.
*/
static deepValue(obj: ObjectLiteral, path: string): ObjectLiteral;
static replaceEmptyObjectsWithBooleans(obj: any): void;
static propertyPathsToTruthyObject(paths: string[]): any;
/**
* Check if two entity-id-maps are the same
*/
static compareIds(firstId: ObjectLiteral | undefined, secondId: ObjectLiteral | undefined): boolean;
/**
* Transforms given value into boolean value.
*/
static toBoolean(value: any): boolean;
/**
* Composes an object from the given array of keys and values.
*/
static zipObject(keys: any[], values: any[]): ObjectLiteral;
/**
* Compares two arrays.
*/
static isArraysEqual(arr1: any[], arr2: any[]): boolean;
static areMutuallyExclusive<T>(...lists: T[][]): boolean;
/**
* Parses the CHECK constraint on the specified column and returns
* all values allowed by the constraint or undefined if the constraint
* is not present.
*/
static parseSqlCheckExpression(sql: string, columnName: string): string[] | undefined;
private static compare2Objects;
}