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    1.5.0 • Public • Published

    Object Agent

    A javascript library for working with objects

    npm build coverage deps size vulnerabilities license


    npm install object-agent

    Requires Babel 7.2+


    Comparison Functions

    deepEqual(item1, item2)boolean

    Deeply compares two items.

    diffUpdate(object1, object2)object

    Performs a deep comparison of two objects, returns a new object with only the first level values that have been changed or added on the second object.


    Tests if an object or array has any set keys. The values of each key are not considered.


    Shallow compares two or more items. All items are compared with SameValue equality except Dates and RegExps which compare their values with SameValue equality, Objects and Arrays which compare key lengths, and instances of objects that compare all properties and prototype objects.

    Data Generation Functions

    combo(array, [length])Array

    Takes an array of values and returns a new array of the unique sets of the values of a given length.


    Mix the contents of multiple arrays into a nested array where all variations of one item from each array is in each of the nested arrays.


    Create a power set from a set of values.

    Interaction Functions

    clone(value, [settings])*

    Deep clone a value.

    erase(object, key)boolean

    Deletes a property from an object, if the property exists.

    get(object, path)*

    Gets a nested value from an object.

    has(object, path)boolean

    Determines if a nested value is defined.


    Performs a deep comparison of objects and returns a new object of values that are equal in all given objects.

    set(object, path, value)object

    Sets a nested value in an object. Keys in the path that don't exist at any point in the object will be created and added to the object once.

    superimpose(...args, [mutateFirst])*

    Deeply superimposes two or more items on each other.


    • Undefined values will not overwrite defined values
    • Array order is maintained
    unset(object, path)object

    Deletes a property from a nested object.

    countInString(string, match)number

    Counts the number of instances of a string within another string.

    Iteration Functions

    fill(length, [callback])Array

    Returns an array of specified length filled with either the index value or the value returned from the provided callback.

    forIn(object, callback)boolean

    Iterates over own and inherited properties of an object. Stops iterating as soon as the callback returns a truthy value.

    forOwn(object, callback)boolean

    Iterates over own properties of an object. Stops iterating as soon as the callback returns a truthy value.

    forOwnReduce(object, callback, initialValue)*

    Iterates over own properties of an object and returns a reduced value.

    mapOwn(object, callback, [ignoreKeys])object | *

    Builds a new object by iterating over own properties of an object.

    nestedEach(arrays, callback, [accrue])

    Iterate over the values of multiple arrays.

    pull(array, path)Array

    Pulls values from an array of objects into a new array.

    repeat(times, callback)

    Calls a callback a specified number of times.

    traverse(object, callback, [isOptimistic])boolean

    Traverses a nested object. Circular objects are only traversed once.

    Path Utility Functions

    appendToPath(path, key, [separator])string

    Adds a key to the end of a path.

    firstInPath(path, [separator])string

    Returns the first key in a path.

    initialInPath(path, [separator])string

    Returns the path without the last key.

    lastInPath(path, [separator])string

    Returns the last key in a path.

    tailInPath(path, [separator])string

    Returns the path without the first key.

    walkPath(path, callback, [separator])

    Calls a callback for every key in a path. If true is returned from the callback then no further calls will be made.


    npm i object-agent

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    • darrenpaulwright