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[njs] Array.prototype.findIndex() method.

April 04, 2017 06:26AM
details: http://hg.nginx.org/njs/rev/26e0ebd97454
branches:
changeset: 331:26e0ebd97454
user: Andrey Zelenkov <zelenkov@nginx.com>
date: Tue Apr 04 06:16:49 2017 +0300
description:
Array.prototype.findIndex() method.

diffstat:

njs/njs_array.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++
njs/test/njs_unit_test.c | 44 ++++++++++++++++++++++++++++++++++++
2 files changed, 102 insertions(+), 0 deletions(-)

diffs (136 lines):

diff -r 52d53653ac52 -r 26e0ebd97454 njs/njs_array.c
--- a/njs/njs_array.c Tue Apr 04 06:10:10 2017 +0300
+++ b/njs/njs_array.c Tue Apr 04 06:16:49 2017 +0300
@@ -100,6 +100,8 @@ static njs_ret_t njs_array_prototype_fil
njs_value_t *args, nxt_uint_t nargs, njs_index_t unused);
static njs_ret_t njs_array_prototype_find_continuation(njs_vm_t *vm,
njs_value_t *args, nxt_uint_t nargs, njs_index_t unused);
+static njs_ret_t njs_array_prototype_find_index_continuation(njs_vm_t *vm,
+ njs_value_t *args, nxt_uint_t nargs, njs_index_t unused);
static njs_ret_t njs_array_prototype_map_continuation(njs_vm_t *vm,
njs_value_t *args, nxt_uint_t nargs, njs_index_t unused);
static nxt_noinline uint32_t njs_array_prototype_map_index(njs_array_t *array,
@@ -1531,6 +1533,54 @@ njs_array_prototype_find_continuation(nj
}


+static njs_ret_t
+njs_array_prototype_find_index(njs_vm_t *vm, njs_value_t *args,
+ nxt_uint_t nargs, njs_index_t unused)
+{
+ nxt_int_t ret;
+ njs_array_iter_t *iter;
+
+ ret = njs_array_iterator_args(vm, args, nargs);
+ if (nxt_slow_path(ret != NXT_OK)) {
+ return ret;
+ }
+
+ iter = njs_vm_continuation(vm);
+ iter->u.cont.function = njs_array_prototype_find_index_continuation;
+ iter->retval.data.truth = 0;
+
+ return njs_array_prototype_find_index_continuation(vm, args, nargs, unused);
+}
+
+
+static njs_ret_t
+njs_array_prototype_find_index_continuation(njs_vm_t *vm, njs_value_t *args,
+ nxt_uint_t nargs, njs_index_t unused)
+{
+ double index;
+ njs_array_iter_t *iter;
+
+ iter = njs_vm_continuation(vm);
+ index = iter->index;
+
+ if (!njs_is_true(&iter->retval)) {
+ iter->index++;
+
+ if (iter->index < iter->length
+ && iter->index < args[0].data.u.array->length)
+ {
+ return njs_array_prototype_find_apply(vm, iter, args, nargs);
+ }
+
+ index = -1;
+ }
+
+ njs_number_set(&vm->retval, index);
+
+ return NXT_OK;
+}
+
+
static nxt_noinline njs_ret_t
njs_array_prototype_find_apply(njs_vm_t *vm, njs_array_iter_t *iter,
njs_value_t *args, nxt_uint_t nargs)
@@ -2147,6 +2197,14 @@ static const njs_object_prop_t njs_arra
njs_continuation_size(njs_array_find_t), 0),
},

+ /* ES6. */
+ {
+ .type = NJS_METHOD,
+ .name = njs_string("findIndex"),
+ .value = njs_native_function(njs_array_prototype_find_index,
+ njs_continuation_size(njs_array_iter_t), 0),
+ },
+
{
.type = NJS_METHOD,
.name = njs_string("map"),
diff -r 52d53653ac52 -r 26e0ebd97454 njs/test/njs_unit_test.c
--- a/njs/test/njs_unit_test.c Tue Apr 04 06:10:10 2017 +0300
+++ b/njs/test/njs_unit_test.c Tue Apr 04 06:16:49 2017 +0300
@@ -2927,6 +2927,50 @@ static njs_unit_test_t njs_test[] =
nxt_string("undefined") },

{ nxt_string("var a = [];"
+ "a.findIndex(function(v, i, a) { return v > 1 })"),
+ nxt_string("-1") },
+
+ { nxt_string("var a = [,NaN,0,-1];"
+ "a.findIndex(function(v, i, a) { return v > 1 })"),
+ nxt_string("-1") },
+
+ { nxt_string("var a = [,NaN,0,-1,2];"
+ "a.findIndex(function(v, i, a) { return v > 1 })"),
+ nxt_string("4") },
+
+ { nxt_string("var a = [1,2,3,-1,5];"
+ "a.findIndex(function(v, i, a) { return v > 1 })"),
+ nxt_string("1") },
+
+ { nxt_string("var a = [,1,,-1,5];"
+ "a.findIndex(function(v, i, a) { return v > 1 })"),
+ nxt_string("4") },
+
+ { nxt_string("var a = [,1,,-1,5,6];"
+ "a.findIndex(function(v, i, a) { return v > 1 })"),
+ nxt_string("4") },
+
+ { nxt_string("[].findIndex(function(v) { return (v === undefined) })"),
+ nxt_string("-1") },
+
+ { nxt_string("[,].findIndex(function(v) { return (v === undefined) })"),
+ nxt_string("0") },
+
+ { nxt_string("[1,2,,3].findIndex(function(el){return el === undefined})"),
+ nxt_string("2") },
+
+ { nxt_string("[,2,,3].findIndex(function(el){return el === undefined})"),
+ nxt_string("0") },
+
+ { nxt_string("var a = [1,2,3,4,5,6];"
+ "a.findIndex(function(v, i, a) { a.shift(); return v == 3 })"),
+ nxt_string("1") },
+
+ { nxt_string("var a = [1,2,3,4,5,6];"
+ "a.findIndex(function(v, i, a) { a.shift(); return v == 4 })"),
+ nxt_string("-1") },
+
+ { nxt_string("var a = [];"
"a.map(function(v, i, a) { return v + 1 })"),
nxt_string("") },

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Subject Author Views Posted

[njs] Array.prototype.findIndex() method.

Igor Sysoev 456 April 04, 2017 06:26AM



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