Very helpful JavaScript functions

good_stuff.js

/**
 * Desc: Checks if a deep property exists
 * Exp: checkNested( { a: { b: { c: "d" } } } );
 * Returns: Boolean
 */
function checkNested( obj ) {
    const args = Array.prototype.slice.call( arguments, 1 );
    for( let i = 0; i < args.length; i++ ) {
        if( !obj || !obj.hasOwnProperty( args[ i ] ) )
            return false;
        obj = obj[ args[ i ] ];
    }
    return true;
}

/**
 * Desc: Checks if string is encoded with encodeURIComponent
 * Exp: isEncoded( "~%2F" );
 * Returns: Boolean
 */
function isEncoded( str ) {
    return typeof str === 'string' && decodeURIComponent( str ) !== str;
}

function isString( str ) {
    return str && typeof str === 'string';
}

function removeProperties( obj, properties ) {
    for( let i = 0; i < properties.length; i++ )
        delete obj[ properties[ i ] ];
    return obj;
}

function isMissingProperty( obj, properties ) {
    let hasOwnProperty = false, i = 0;
    for( ; i < properties.length; i++ )
        if( !obj.hasOwnProperty( properties[ i ] ) )
            hasOwnProperty = properties[ i ];
    return hasOwnProperty;
}

function containsProperty( obj, properties ) {
    let hasOwnProperty = false, i = 0;
    for( ; i < properties.length; i++ )
        if( !hasOwnProperty && obj.hasOwnProperty( properties[ i ] ) )
            hasOwnProperty = properties[ i ];
    return hasOwnProperty;
}

function payloadSizeMax( obj ) {
    return JSON.stringify( obj ).length >= 1536;
}

function uriSizeMax( obj ) {
    let isOk = false;
    Object.keys( obj ).filter( k => isOk = !isOk ? k.length >= 512 ? k : isOk : isOk );
    return isOk;
}

function notValidEmail( email ) {
    return !/^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/.test( email );
}

function notValidPassword( pass ) {
    return !/^(((?=.*[a-z])(?=.*[A-Z]))|((?=.*[a-z])(?=.*[0-9]))|((?=.*[A-Z])(?=.*[0-9])))(?=.{6,})/.test( pass );
}

function cleanObj( o ) {
    if( o && o === o )
        if( typeof o === "string" ) return o;
        else if( typeof o === "number" ) return o;
        else if( Array.isArray( o ) ) {
            let x = [], i = -1, l = o.length, r = 0;
            while( ++i < l ) if( o[ i ] ) x[ r++ ] = cleanObj( o[ i ] );
            return x;
        } else if( typeof o === "object" ) {
            for( const k in o ) o[ k ] ? o[ k ] = cleanObj( o[ k ] ) : delete o[ k ];
            return o;
        } else
            return "Argument Error - Unknown Item";
}