Merge branch 'master' of git://github.com/bjorn/wren into bjorn-master

builtin/core.wren

@@ -22,6 +22,13 @@ class Sequence {
     return true
   }
 
+  any(f) {
+    for (element in this) {
+      if (f.call(element)) return true
+    }
+    return false
+  }
+
   reduce(acc, f) {
     for (element in this) {
       acc = f.call(acc, element)

doc/site/core/sequence.markdown

@@ -11,13 +11,25 @@ core [iterator protocol][] can extend this to get a number of helpful methods.
 Tests whether all the elements in the sequence pass the `predicate`.
 
 Iterates over the sequence, passing each element to the function `predicate`.
-If it returns `false`, stops iterating and returns `false`. Otherwise, returns
-`true`.
+If its return value evaluates to `false`, stops iterating and returns `false`.
+Otherwise, returns `true`.
 
     :::dart
     [1, 2, 3].all {|n| n > 2} // False.
     [1, 2, 3].all {|n| n < 4} // True.
 
+### **any**(predicate)
+
+Tests whether any element in the sequence passes the `predicate`.
+
+Iterates over the sequence, passing each element to the function `predicate`.
+If its return value evaluates to `true`, stops iterating and returns `true`.
+Otherwise, returns `false`.
+
+    :::dart
+    [1, 2, 3].any {|n| n < 1} // False.
+    [1, 2, 3].any {|n| n > 2} // True.
+
 ### **join**(sep)
 
 Returns a string representation of the list. The string representations of the

doc/site/qa.markdown

@@ -61,12 +61,12 @@ Here's the same example in Wren:
     }
 
     // create and use an Account
-    var acc = new Account(100)
+    var acc = new Account(1000)
     acc.withdraw(100)
 
 Classes have a reputation for complexity because most of the widely used
 languages with them are quite complex: C++, Java, C#, Ruby, and Python. I hope
-to show with Wren that is those languages that are complex, and not classes
+to show with Wren that it is those languages that are complex, and not classes
 themselves.
 
 Smalltalk, the language that inspired most of those languages, is famously

src/wren_core.c

@@ -68,6 +68,13 @@ static const char* libSource =
 "    return true\n"
 "  }\n"
 "\n"
+"  any(f) {\n"
+"    for (element in this) {\n"
+"      if (f.call(element)) return true\n"
+"    }\n"
+"    return false\n"
+"  }\n"
+"\n"
 "  reduce(acc, f) {\n"
 "    for (element in this) {\n"
 "      acc = f.call(acc, element)\n"

test/list/any.wren

@@ -0,0 +1,10 @@
+var a = [1, 2, 3]
+
+var b = a.any {|x| x > 3 }
+IO.print(b) // expect: false
+
+var d = a.any {|x| x > 1 }
+IO.print(d) // expect: true
+
+var e = [].any {|x| true }
+IO.print(e) // expect: false

test/list/any_non_bool_returning_fn.wren

@@ -0,0 +1 @@
+IO.print([1, 2, 3].any {|x| "truthy" }) // expect: true

test/list/any_non_function_arg.wren

@@ -0,0 +1 @@
+[1, 2, 3].any("string") // expect runtime error: String does not implement 'call(_)'.