refactor: use base array assertion utility

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---

Author: kgryte

lib/node_modules/@stdlib/stats/ranks/lib/validate.js

@@ -20,7 +20,7 @@
 
 // MODULES //
 
-var contains = require( '@stdlib/assert/contains' );
+var contains = require( '@stdlib/array/base/assert/contains' ).factory;
 var isArray = require( '@stdlib/assert/is-array' );
 var isObject = require( '@stdlib/assert/is-object' );
 var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
@@ -33,6 +33,9 @@ var format = require( '@stdlib/string/format' );
 var METHODS = [ 'min', 'max', 'average', 'dense', 'ordinal' ];
 var MISSING = [ 'last', 'first', 'remove' ];
 
+var isMethod = contains( METHODS );
+var isMissing = contains( MISSING );
+
 
 // MAIN //
 
@@ -59,13 +62,13 @@ function validate( opts, options ) {
 	}
 	if ( hasOwnProp( options, 'method' ) ) {
 		opts.method = options.method;
-		if ( !isString( opts.method ) || !contains( METHODS, opts.method ) ) {
+		if ( !isString( opts.method ) || !isMethod( opts.method ) ) {
 			return new TypeError( format( 'invalid option. `%s` option must be one of the following: "%s". Option: `%s`.', 'method', METHODS.join( '", "' ), opts.method ) );
 		}
 	}
 	if ( hasOwnProp( options, 'missing' ) ) {
 		opts.missing = options.missing;
-		if ( !isString( opts.missing ) || !contains( MISSING, opts.missing ) ) {
+		if ( !isString( opts.missing ) || !isMissing( opts.missing ) ) {
 			return new TypeError( format( 'invalid option. `%s` option must be one of the following: "%s". Option: `%s`.', 'missing', MISSING.join( '", "' ), opts.missing ) );
 		}
 	}