function everyBy( collection, predicate, thisArg ) {
	var out;
	var len;
	var i;
	if ( !isCollection( collection ) ) {
		throw new TypeError( format( 'invalid argument. First argument must be a collection. Value: `%s`.', collection ) );
	}
	if ( !isFunction( predicate ) ) {
		throw new TypeError( format( 'invalid argument. Second argument must be a function. Value: `%s`.', predicate ) );
	}
	len = collection.length;
	for ( i = 0; i < len; i++ ) {
		out = predicate.call( thisArg, collection[ i ], i, collection );
		if ( !out ) {
			return false;
		}
		// Account for dynamically resizing a collection:
		len = collection.length;
	}
	return true;
}
Tests whether all elements in a collection pass a test implemented by a predicate function.

@param {Collection} collection - input collection
@param {Function} predicate - test function
@param {*} [thisArg] - execution context
@throws {TypeError} first argument must be a collection
@throws {TypeError} second argument must be a function
@returns {boolean} boolean indicating whether all elements pass a test

@example
function isPositive( v ) {
    return ( v > 0 );
}

var arr = [ 1, 2, 3, 4 ];

var bool = everyBy( arr, isPositive );
// returns true