feat: add indexOf method to array/complex64

lib/node_modules/@stdlib/array/complex64/lib/main.js

@@ -106,7 +106,7 @@
 * @param {*} value - value to test
 * @returns {boolean} boolean indicating if a value is a `Complex64Array`
 */
 function isComplex64Array( value ) { // TODO: move to array/base/assert/is-complex64-array
 	return (
 		typeof value === 'object' &&
 		value !== null &&
@@ -122,7 +122,7 @@
 * @param {*} value - value to test
 * @returns {boolean} boolean indicating if a value is a `Complex128Array`
 */
 function isComplex128Array( value ) { // TODO: move to array/base/assert/is-complex128-array
 	return (
 		typeof value === 'object' &&
 		value !== null &&
@@ -281,7 +281,7 @@
 			}
 			buf = buf[ ITERATOR_SYMBOL ]();
 			if ( !isFunction( buf.next ) ) {
 				throw new TypeError( format( 'invalid argument. Must provide a length, ArrayBuffer, typed array, array-like object, or an iterable. Value: `%s`.', buf ) ); // FIXME: `buf` is what is returned from above, NOT the original value
 			}
 			buf = fromIterator( buf );
 			if ( buf instanceof Error ) {
@@ -746,7 +746,7 @@
 	if ( !isComplexArray( this ) ) {
 		throw new TypeError( 'invalid invocation. `this` is not a complex number array.' );
 	}
 	// FIXME: prefer a functional `copyWithin` implementation which addresses lack of universal browser support (e.g., IE11 and Safari) or ensure that typed arrays are polyfilled
 	if ( arguments.length === 2 ) {
 		this._buffer.copyWithin( target*2, start*2 );
 	} else {
@@ -971,6 +971,67 @@
 	return getComplex64( this._buffer, idx );
 });
 
+/**
+* Return the first index at which a given element can be found.
+*
+* @name indexOf
+* @memberof Complex64Array.prototype
+* @type {Function}
+* @param {Complex64} searchElement - element to find
+* @param {integer} [searchFrom=0] - starting index (inclusive)
+* @throws {TypeError} `this` must be a complex number array
+* @throws {TypeError} first argument must be a complex number
+* @throws {TypeError} second argument must be an nonnegative integer
+* @returns {integer} index or -1
+*
+* @example
+* var Complex64 = require( '@stdlib/complex/float32' );
+*
+* var arr = new Complex64Array( 10 );
+*
+* arr.set( [ 1.0, -1.0 ], 0 );
+* arr.set( [ 2.0, -2.0 ], 1 );
+* arr.set( [ 3.0, -3.0 ], 2 );
+* arr.set( [ 4.0, -4.0 ], 3 );
+* arr.set( [ 5.0, -5.0 ], 4 );
+*
+* var idx = arr.indexOf( new Complex64( 3.0, -3.0 ) );
+* // returns 2
+*
+* idx = arr.indexOf( new Complex64( 3.0, -3.0 ), 3 );
+* // returns -1
+*/
+setReadOnly( Complex64Array.prototype, 'indexOf', function indexOf( element, searchFrom ) {
+	var buf;
+	var idx;
+	var re;
+	var im;
+	var i;
+	if ( !isComplexArray( this ) ) {
+		throw new TypeError( 'invalid invocation. `this` is not a complex number array.' );
+	}
+	if ( !isComplexLike( element ) ) {
+		throw new TypeError( format( 'invalid argument. First argument must be a complex number. Value: `%s`.', element ) );
+	}
+	if ( arguments.length > 1 ) {
+		if ( !isNonNegativeInteger( searchFrom ) ) {
+			throw new TypeError( format( 'invalid argument. Second argument must be a nonnegative integer. Value: `%s`.', searchFrom ) );
+		}
+	} else {
+		searchFrom = 0;
+	}
+	re = realf( element );
+	im = imagf( element );
+	buf = this._buffer;
+	for ( i = searchFrom; i < this._length; i++ ) {
+		idx = 2 * i;
+		if ( real === buf[ idx ] && imag === buf[ idx+1 ] ) {
+			return i;
+		}
+	}
+	return -1;
+});
+
 /**
 * Number of array elements.
 *
@@ -1147,7 +1208,7 @@
 				// We need to copy source values...
 				tmp = new Float32Array( N );
 				for ( i = 0; i < N; i++ ) {
 					tmp[ i ] = sbuf[ i ]; // TODO: handle accessor arrays
 				}
 				sbuf = tmp;
 			}