feat: implement list->indexOf()

builtin/method_list.py

@@ -7,6 +7,7 @@
 from core import vm
 from frontend import typed_args
 from mycpp.mylib import log
+from ysh import val_ops
 
 _ = log
 
@@ -75,3 +76,23 @@ def Call(self, rd):
         li.reverse()
 
         return value.Null
+
+class IndexOf(vm._Callable):
+
+    def __init__(self):
+        # type: () -> None
+        pass
+
+    def Call(self, rd):
+        # type: (typed_args.Reader) -> value_t
+
+        li = rd.PosList()
+        needle = rd.PosValue()
+        rd.Done()
+        for i in range(len(li)):
+            try:
+                if val_ops.ExactlyEqual(li[i], needle, -1):
+                    return value.Int(i)
+            except:
+                pass
+        return value.Int(-1)

core/shell.py

@@ -763,7 +763,7 @@ def Main(
         'pop': method_list.Pop(),
         'insert': None,  # insert object before index
         'remove': None,  # insert object before index
-        'find': None,  # return first index of value, or -1
+        'indexOf': method_list.IndexOf(),  # return first index of value, or -1
         # Python list() has index(), which raises ValueError
         # But this is consistent with Str->find(), and doesn't
         # use exceptions

doc/ref/chap-type-method.md

@@ -63,7 +63,9 @@ Respects unicode.
 
 ### extend()
 
-### find()
+### indexOf()
+
+Returns -1 if element is not in the index.
 
 ### insert()
 

doc/ref/toc-ysh.md

@@ -239,7 +239,7 @@ X [Builtin Sub]   _buffer
               X trim()   X trimLeft()   X trimRight()
               X trimPrefix()   X trimSuffix()
               upper()   lower()  # ascii or unicode
-  [List]      append()   pop()   extend()   X find()
+  [List]      append()   pop()   extend()   indexOf()
               X insert()   X remove()   reverse()
   [Dict]      keys()   values()   X get()   X erase()
               X inc()   X accum()

spec/ysh-methods.test.sh

@@ -99,6 +99,20 @@ setvar is_a_val = "xyz"
 (Bool)   True
 ## END
 
+#### Lis->indexOf
+var items = [1, '2', 3, { 'a': 5 }]
+
+write -- $[items->indexOf('a')]
+write -- $[items->indexOf(1)]
+write -- $[items->indexOf('2')]
+write -- $[items->indexOf({'a': 5})]
+## STDOUT:
+-1
+0
+1
+3
+## END
+
 #### List->join
 var items = [1, 2, 3]