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https://github.com/fluencelabs/wasm-bindgen
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add binding for lastIndexOf
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@ -105,4 +105,11 @@ extern {
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/// http://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf
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#[wasm_bindgen(method, js_name = indexOf)]
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pub fn index_of(this: &Array, value: JsValue, from_index: i32) -> i32;
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/// The lastIndexOf() method returns the last index at which a given element can be found in the array, or -1 if it is not present.
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/// The array is searched backwards, starting at fromIndex.
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///
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/// http://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/lastIndexOf
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#[wasm_bindgen(method, js_name = lastIndexOf)]
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pub fn last_index_of(this: &Array, value: JsValue, from_index: i32) -> i32;
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}
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@ -39,3 +39,41 @@ fn index_of() {
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"#)
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.test()
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}
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#[test]
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fn last_index_of() {
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project()
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.file("src/lib.rs", r#"
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#![feature(proc_macro, wasm_custom_section)]
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extern crate wasm_bindgen;
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use wasm_bindgen::prelude::*;
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use wasm_bindgen::js;
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#[wasm_bindgen]
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pub fn get_last_index_of(this: &js::Array, value: JsValue, from_index: i32) -> i32 {
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this.last_index_of(value, from_index)
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}
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"#)
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.file("test.ts", r#"
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import * as assert from "assert";
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import * as wasm from "./out";
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export function test() {
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let characters = ["a", "x", "c", "x", "n"];
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let index = wasm.get_last_index_of(characters, "x", 5);
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let notFoundIndex = wasm.get_last_index_of(characters, "z", 5);
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assert.equal(index, 3);
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assert.equal(notFoundIndex, -1);
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let withFromIndex = wasm.get_last_index_of(characters, "x", 2);
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let withFromIndexNotFound = wasm.get_last_index_of(characters, "x", 0);
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assert.equal(withFromIndex, 1);
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assert.equal(withFromIndexNotFound, -1);
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}
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"#)
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.test()
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}
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