diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/README.md b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/README.md index 87682c4e81d1..9a0cc22175e3 100644 --- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/README.md +++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/README.md @@ -42,25 +42,38 @@ Returns the index of the first falsy element in a one-dimensional double-precisi ```javascript var Float64Vector = require( '@stdlib/ndarray/vector/float64' ); +var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' ); var x = new Float64Vector( [ 1.0, 0.0, 3.0, 2.0 ] ); -var idx = dindexOfFalsy( [ x ] ); +var fromIndex = scalar2ndarray( 0, { + 'dtype': 'generic' +}); + +var idx = dindexOfFalsy( [ x, fromIndex ] ); // returns 1 ``` The function has the following parameters: -- **arrays**: array-like object containing a one-dimensional input ndarray. +- **arrays**: array-like object containing the following ndarrays: + + - a one-dimensional input ndarray. + - a zero-dimensional ndarray containing the index from which to begin searching. If the function is unable to find a falsy element, the function returns `-1`. ```javascript var Float64Vector = require( '@stdlib/ndarray/vector/float64' ); +var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' ); var x = new Float64Vector( [ 1.0, 2.0, 3.0, 4.0 ] ); -var idx = dindexOfFalsy( [ x ] ); +var fromIndex = scalar2ndarray( 0, { + 'dtype': 'generic' +}); + +var idx = dindexOfFalsy( [ x, fromIndex ] ); // returns -1 ``` @@ -73,6 +86,7 @@ var idx = dindexOfFalsy( [ x ] ); ## Notes - The function treats `NaN` values as falsy. +- If a specified starting search index is negative, the function resolves the starting search index by counting backward from the last element (where `-1` refers to the last element). @@ -86,6 +100,7 @@ var idx = dindexOfFalsy( [ x ] ); ```javascript var bernoulli = require( '@stdlib/random/bernoulli' ); +var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' ); var ndarray2array = require( '@stdlib/ndarray/to-array' ); var dindexOfFalsy = require( '@stdlib/blas/ext/base/ndarray/dindex-of-falsy' ); @@ -96,7 +111,11 @@ var opts = { var x = bernoulli( [ 10 ], 0.7, opts ); console.log( ndarray2array( x ) ); -var idx = dindexOfFalsy( [ x ] ); +var fromIndex = scalar2ndarray( 0, { + 'dtype': 'generic' +}); + +var idx = dindexOfFalsy( [ x, fromIndex ] ); console.log( idx ); ``` diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/benchmark/benchmark.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/benchmark/benchmark.js index ec2ee3eb7556..ffd48ce73b62 100644 --- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/benchmark/benchmark.js +++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/benchmark/benchmark.js @@ -22,6 +22,7 @@ var bench = require( '@stdlib/bench' ); var ones = require( '@stdlib/ndarray/ones' ); +var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' ); var isInteger = require( '@stdlib/assert/is-integer' ).isPrimitive; var pow = require( '@stdlib/math/base/special/pow' ); var format = require( '@stdlib/string/format' ); @@ -46,7 +47,13 @@ var options = { * @returns {Function} benchmark function */ function createBenchmark( len ) { - var x = ones( [ len ], options ); + var fromIndex; + var x; + + x = ones( [ len ], options ); + fromIndex = scalar2ndarray( 0, { + 'dtype': 'generic' + }); return benchmark; /** @@ -61,7 +68,7 @@ function createBenchmark( len ) { b.tic(); for ( i = 0; i < b.iterations; i++ ) { - out = dindexOfFalsy( [ x ] ); + out = dindexOfFalsy( [ x, fromIndex ] ); if ( out !== out ) { b.fail( 'should return an integer' ); } diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/docs/repl.txt b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/docs/repl.txt index b53d77e00ce6..cb788fe27e1d 100644 --- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/docs/repl.txt +++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/docs/repl.txt @@ -3,6 +3,10 @@ Returns the index of the first falsy element in a one-dimensional double- precision floating-point ndarray. + If a specified starting search index is negative, the function resolves the + starting search index by counting backward from the last element (where `-1` + refers to the last element). + If unable to find a falsy element, the function returns `-1`. Parameters @@ -11,6 +15,8 @@ Array-like object containing the following ndarrays: - a one-dimensional input ndarray. + - a zero-dimensional ndarray containing the index from which to begin + searching. Returns ------- @@ -20,7 +26,8 @@ Examples -------- > var x = new {{alias:@stdlib/ndarray/vector/float64}}( [ 1.0, 0.0, 3.0 ] ); - > {{alias}}( [ x ] ) + > var i = {{alias:@stdlib/ndarray/from-scalar}}( 0, { 'dtype': 'generic' } ); + > {{alias}}( [ x, i ] ) 1 See Also diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/docs/types/index.d.ts b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/docs/types/index.d.ts index 251546ec35d0..8d976393216b 100644 --- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/docs/types/index.d.ts +++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/docs/types/index.d.ts @@ -20,7 +20,7 @@ /// -import { float64ndarray } from '@stdlib/types/ndarray'; +import { float64ndarray, typedndarray } from '@stdlib/types/ndarray'; /** * Returns the index of the first falsy element in a one-dimensional double-precision floating-point ndarray. @@ -30,19 +30,25 @@ import { float64ndarray } from '@stdlib/types/ndarray'; * - The function expects the following ndarrays: * * - a one-dimensional input ndarray. +* - a zero-dimensional ndarray containing the index from which to begin searching. * * @param arrays - array-like object containing ndarrays * @returns index * * @example * var Float64Vector = require( '@stdlib/ndarray/vector/float64' ); +* var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' ); * * var x = new Float64Vector( [ 1.0, 0.0, 3.0, 2.0 ] ); * -* var v = dindexOfFalsy( [ x ] ); +* var fromIndex = scalar2ndarray( 0, { +* 'dtype': 'generic' +* }); +* +* var v = dindexOfFalsy( [ x, fromIndex ] ); * // returns 1 */ -declare function dindexOfFalsy( arrays: [ float64ndarray ] ): number; +declare function dindexOfFalsy( arrays: [ float64ndarray, typedndarray ] ): number; // EXPORTS // diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/docs/types/test.ts b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/docs/types/test.ts index c08f1a75bc5f..9275743499d9 100644 --- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/docs/types/test.ts +++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/docs/types/test.ts @@ -19,6 +19,7 @@ /* eslint-disable space-in-parens */ import zeros = require( '@stdlib/ndarray/zeros' ); +import scalar2ndarray = require( '@stdlib/ndarray/from-scalar' ); import dindexOfFalsy = require( './index' ); @@ -29,8 +30,11 @@ import dindexOfFalsy = require( './index' ); const x = zeros( [ 10 ], { 'dtype': 'float64' }); + const fromIndex = scalar2ndarray( 0, { + 'dtype': 'generic' + }); - dindexOfFalsy( [ x ] ); // $ExpectType number + dindexOfFalsy( [ x, fromIndex ] ); // $ExpectType number } // The compiler throws an error if the function is provided a first argument which is not an array of ndarrays... @@ -51,7 +55,10 @@ import dindexOfFalsy = require( './index' ); const x = zeros( [ 10 ], { 'dtype': 'float64' }); + const fromIndex = scalar2ndarray( 0, { + 'dtype': 'generic' + }); dindexOfFalsy(); // $ExpectError - dindexOfFalsy( [ x ], {} ); // $ExpectError + dindexOfFalsy( [ x, fromIndex ], {} ); // $ExpectError } diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/examples/index.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/examples/index.js index a2c2b3c55768..e13c1ba2bbdc 100644 --- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/examples/index.js +++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/examples/index.js @@ -19,6 +19,7 @@ 'use strict'; var bernoulli = require( '@stdlib/random/bernoulli' ); +var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' ); var ndarray2array = require( '@stdlib/ndarray/to-array' ); var dindexOfFalsy = require( './../lib' ); @@ -29,5 +30,9 @@ var opts = { var x = bernoulli( [ 10 ], 0.7, opts ); console.log( ndarray2array( x ) ); -var idx = dindexOfFalsy( [ x ] ); +var fromIndex = scalar2ndarray( 0, { + 'dtype': 'generic' +}); + +var idx = dindexOfFalsy( [ x, fromIndex ] ); console.log( idx ); diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/lib/index.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/lib/index.js index 8018e1ff0920..eb3d81ebb51e 100644 --- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/lib/index.js +++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/lib/index.js @@ -25,11 +25,16 @@ * * @example * var Float64Vector = require( '@stdlib/ndarray/vector/float64' ); +* var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' ); * var dindexOfFalsy = require( '@stdlib/blas/ext/base/ndarray/dindex-of-falsy' ); * * var x = new Float64Vector( [ 1.0, 0.0, 3.0, 2.0 ] ); * -* var v = dindexOfFalsy( [ x ] ); +* var fromIndex = scalar2ndarray( 0, { +* 'dtype': 'generic' +* }); +* +* var v = dindexOfFalsy( [ x, fromIndex ] ); * // returns 1 */ diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/lib/main.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/lib/main.js index 2ba023ee9790..6b0b7c8f93fc 100644 --- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/lib/main.js +++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/lib/main.js @@ -20,10 +20,12 @@ // MODULES // +var ndarraylike2scalar = require( '@stdlib/ndarray/base/ndarraylike2scalar' ); var numelDimension = require( '@stdlib/ndarray/base/numel-dimension' ); var getStride = require( '@stdlib/ndarray/base/stride' ); var getOffset = require( '@stdlib/ndarray/base/offset' ); var getData = require( '@stdlib/ndarray/base/data-buffer' ); +var clipIndex = require( '@stdlib/ndarray/base/clip-index' ); var strided = require( '@stdlib/blas/ext/base/dindex-of-falsy' ).ndarray; @@ -37,21 +39,50 @@ var strided = require( '@stdlib/blas/ext/base/dindex-of-falsy' ).ndarray; * - The function expects the following ndarrays: * * - a one-dimensional input ndarray. +* - a zero-dimensional ndarray containing the index from which to begin searching. * * @param {ArrayLikeObject} arrays - array-like object containing ndarrays * @returns {integer} index * * @example * var Float64Vector = require( '@stdlib/ndarray/vector/float64' ); +* var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' ); * * var x = new Float64Vector( [ 1.0, 0.0, 3.0, 2.0 ] ); * -* var v = dindexOfFalsy( [ x ] ); +* var fromIndex = scalar2ndarray( 0, { +* 'dtype': 'generic' +* }); +* +* var v = dindexOfFalsy( [ x, fromIndex ] ); * // returns 1 */ function dindexOfFalsy( arrays ) { - var x = arrays[ 0 ]; - return strided( numelDimension( x, 0 ), getData( x ), getStride( x, 0 ), getOffset( x ) ); + var fromIndex; + var stride; + var offset; + var idx; + var N; + var x; + + x = arrays[ 0 ]; + fromIndex = ndarraylike2scalar( arrays[ 1 ] ); + + N = numelDimension( x, 0 ); + fromIndex = clipIndex( fromIndex, N ); + if ( fromIndex >= N ) { + return -1; + } + N -= fromIndex; + + stride = getStride( x, 0 ); + offset = getOffset( x ) + ( stride*fromIndex ); + + idx = strided( N, getData( x ), stride, offset ); + if ( idx >= 0 ) { + idx += fromIndex; + } + return idx; } diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/test/test.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/test/test.js index 134f1d077f21..b19a785f82c2 100644 --- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/test/test.js +++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dindex-of-falsy/test/test.js @@ -22,6 +22,7 @@ var tape = require( 'tape' ); var Float64Array = require( '@stdlib/array/float64' ); +var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' ); var ndarray = require( '@stdlib/ndarray/base/ctor' ); var dindexOfFalsy = require( './../lib' ); @@ -52,52 +53,167 @@ tape( 'main export is a function', function test( t ) { }); tape( 'the function returns the index of the first falsy element', function test( t ) { + var fromIndex; var actual; var x; x = vector( new Float64Array( [ 1.0, 1.0, 0.0, 2.0, 0.0, 1.0 ] ), 6, 1, 0 ); + fromIndex = scalar2ndarray( 0, { + 'dtype': 'generic' + }); - actual = dindexOfFalsy( [ x ] ); + actual = dindexOfFalsy( [ x, fromIndex ] ); t.strictEqual( actual, 2, 'returns expected value' ); x = vector( new Float64Array( [ 1.0, 1.0, 0.0, 2.0, 0.0, 1.0 ] ), 4, 1, 2 ); + fromIndex = scalar2ndarray( 0, { + 'dtype': 'generic' + }); - actual = dindexOfFalsy( [ x ] ); + actual = dindexOfFalsy( [ x, fromIndex ] ); t.strictEqual( actual, 0, 'returns expected value' ); x = vector( new Float64Array( [ 1.0, 1.0, 0.0, 2.0, 0.0, 1.0 ] ), 3, 2, 0 ); + fromIndex = scalar2ndarray( 0, { + 'dtype': 'generic' + }); - actual = dindexOfFalsy( [ x ] ); + actual = dindexOfFalsy( [ x, fromIndex ] ); t.strictEqual( actual, 1, 'returns expected value' ); // Negative stride... x = vector( new Float64Array( [ 1.0, 1.0, 0.0, 2.0, 0.0, 1.0 ] ), 6, -1, 5 ); + fromIndex = scalar2ndarray( 0, { + 'dtype': 'generic' + }); - actual = dindexOfFalsy( [ x ] ); + actual = dindexOfFalsy( [ x, fromIndex ] ); + t.strictEqual( actual, 1, 'returns expected value' ); + + t.end(); +}); + +tape( 'the function supports a `fromIndex` parameter (nonnegative)', function test( t ) { + var fromIndex; + var actual; + var x; + + x = vector( new Float64Array( [ 0.0, 1.0, 0.0, 1.0, 0.0, 1.0 ] ), 6, 1, 0 ); + + fromIndex = scalar2ndarray( 0, { + 'dtype': 'generic' + }); + actual = dindexOfFalsy( [ x, fromIndex ] ); + t.strictEqual( actual, 0, 'returns expected value' ); + + fromIndex = scalar2ndarray( 1, { + 'dtype': 'generic' + }); + actual = dindexOfFalsy( [ x, fromIndex ] ); + t.strictEqual( actual, 2, 'returns expected value' ); + + fromIndex = scalar2ndarray( 3, { + 'dtype': 'generic' + }); + actual = dindexOfFalsy( [ x, fromIndex ] ); + t.strictEqual( actual, 4, 'returns expected value' ); + + t.end(); +}); + +tape( 'the function supports a `fromIndex` parameter (negative)', function test( t ) { + var fromIndex; + var actual; + var x; + + x = vector( new Float64Array( [ 1.0, 0.0, 1.0, 0.0, 1.0, 0.0 ] ), 6, 1, 0 ); + + fromIndex = scalar2ndarray( -1, { + 'dtype': 'generic' + }); + actual = dindexOfFalsy( [ x, fromIndex ] ); + t.strictEqual( actual, 5, 'returns expected value' ); + + fromIndex = scalar2ndarray( -2, { + 'dtype': 'generic' + }); + actual = dindexOfFalsy( [ x, fromIndex ] ); + t.strictEqual( actual, 5, 'returns expected value' ); + + fromIndex = scalar2ndarray( -3, { + 'dtype': 'generic' + }); + actual = dindexOfFalsy( [ x, fromIndex ] ); + t.strictEqual( actual, 3, 'returns expected value' ); + + fromIndex = scalar2ndarray( -7, { + 'dtype': 'generic' + }); + actual = dindexOfFalsy( [ x, fromIndex ] ); t.strictEqual( actual, 1, 'returns expected value' ); t.end(); }); tape( 'the function treats `NaN` values as falsy', function test( t ) { + var fromIndex; var actual; var x; x = vector( new Float64Array( [ 3.0, 5.0, NaN, 0.0 ] ), 4, 1, 0 ); + fromIndex = scalar2ndarray( 0, { + 'dtype': 'generic' + }); - actual = dindexOfFalsy( [ x ] ); + actual = dindexOfFalsy( [ x, fromIndex ] ); t.strictEqual( actual, 2, 'returns expected value' ); t.end(); }); tape( 'the function returns `-1` if unable to find a falsy element', function test( t ) { + var fromIndex; var actual; var x; x = vector( new Float64Array( [ 1.0, 2.0, 3.0, 4.0 ] ), 4, 1, 0 ); + fromIndex = scalar2ndarray( 0, { + 'dtype': 'generic' + }); + + actual = dindexOfFalsy( [ x, fromIndex ] ); + t.strictEqual( actual, -1, 'returns expected value' ); + + t.end(); +}); + +tape( 'the function returns `-1` if provided an empty one-dimensional ndarray', function test( t ) { + var fromIndex; + var actual; + var x; + + x = vector( new Float64Array( [] ), 0, 1, 0 ); + fromIndex = scalar2ndarray( 0, { + 'dtype': 'generic' + }); + + actual = dindexOfFalsy( [ x, fromIndex ] ); + t.strictEqual( actual, -1, 'returns expected value' ); + + t.end(); +}); + +tape( 'the function returns `-1` if provided a starting search index which is greater than or equal to number of elements in the input ndarray', function test( t ) { + var fromIndex; + var actual; + var x; + + x = vector( new Float64Array( [ 0.0, 1.0, 0.0, 1.0, 0.0, 1.0 ] ), 6, 1, 0 ); + fromIndex = scalar2ndarray( 7, { + 'dtype': 'generic' + }); - actual = dindexOfFalsy( [ x ] ); + actual = dindexOfFalsy( [ x, fromIndex ] ); t.strictEqual( actual, -1, 'returns expected value' ); t.end();