Query array for multiple matches

It's now possible to query an array for multiple matches by adding the
'#' character immediately following the query.

For example, using the following JSON:

  {
    "friends": [
      {"first": "Dale", "last": "Murphy"},
      {"first": "Roger", "last": "Craig"},
      {"first": "Jane", "last": "Murphy"}
    ]
  }

To return the first match:

  `friends.#[last="Murphy"].first` >> "Dale"

To return all matches:

  `friends.#[last="Murphy"]#.first` >> ["Dale","Jane"]

Thanks to @chuttam for requesting this feature, closes #15.

README.md

@@ -66,8 +66,9 @@ The dot and wildcard characters can be escaped with '\'.
   "children": ["Sara","Alex","Jack"],
   "fav.movie": "Deer Hunter",
   "friends": [
-	{"first": "James", "last": "Murphy"},
-	{"first": "Roger", "last": "Craig"}
+	{"first": "Dale", "last": "Murphy"},
+	{"first": "Roger", "last": "Craig"},
+	{"first": "Jane", "last": "Murphy"}
   ]
 }
 ```
@@ -80,12 +81,16 @@ The dot and wildcard characters can be escaped with '\'.
 "child*.2"           >> "Jack"
 "c?ildren.0"         >> "Sara"
 "fav\.movie"         >> "Deer Hunter"
-"friends.#.first"    >> ["James","Roger"]
+"friends.#.first"    >> ["Dale","Roger","Jane"]
 "friends.1.last"     >> "Craig"
 ```
-To query an array:
+To query an array for the first match:
 ```
-`friends.#[last="Murphy"].first` >> "James"
+`friends.#[last="Murphy"].first` >> "Dale"
+```
+To query an array for all matches:
+```
+`friends.#[last="Murphy"]#.first` >> ["Dale","Jane"]
 ```
 
 ## Result Type

gjson.go

@@ -554,6 +554,7 @@ type arrayPathResult struct {
 		path  string
 		op    string
 		value string
+		all   bool
 	}
 }
 
@@ -644,6 +645,9 @@ func parseArrayPath(path string) (r arrayPathResult) {
 									}
 								}
 							} else if path[i] == ']' {
+								if i+1 < len(path) && path[i+1] == '#' {
+									r.query.all = true
+								}
 								break
 							}
 						}
@@ -975,6 +979,7 @@ func parseArray(c *parseContext, i int, path string) (int, bool) {
 	var h int
 	var alog []int
 	var partidx int
+	var multires []byte
 	rp := parseArrayPath(path)
 	if !rp.arrch {
 		n, err := strconv.ParseUint(rp.part, 10, 64)
@@ -1031,13 +1036,22 @@ func parseArray(c *parseContext, i int, path string) (int, bool) {
 						res := Get(val, rp.query.path)
 						if queryMatches(&rp, res) {
 							if rp.more {
-								c.value = Get(val, rp.path)
+								res = Get(val, rp.path)
 							} else {
-								c.value.Raw = val
-								c.value.Type = JSON
+								res = Result{Raw: val, Type: JSON}
 							}
+							if rp.query.all {
+								if len(multires) == 0 {
+									multires = append(multires, '[')
+								} else {
+									multires = append(multires, ',')
+								}
+								multires = append(multires, res.Raw...)
+							} else {
+								c.value = res
 								return i, true
 							}
+						}
 					} else if hit {
 						if rp.alogok {
 							break
@@ -1123,6 +1137,12 @@ func parseArray(c *parseContext, i int, path string) (int, bool) {
 						return i + 1, true
 					}
 				}
+				if len(multires) > 0 && !c.value.Exists() {
+					c.value = Result{
+						Raw:  string(append(multires, ']')),
+						Type: JSON,
+					}
+				}
 				return i + 1, false
 			}
 			break

gjson_test.go

@@ -107,17 +107,20 @@ var basicJSON = `{"age":100, "name":{"here":"B\\\"R"},
     	    {
     	        "firstName": "Brett",
     	        "lastName": "McLaughlin",
-    	        "email": "aaaa"
+    	        "email": "aaaa",
+				"tag": "good"
     	    },
     	    {
     	        "firstName": "Jason",
     	        "lastName": "Hunter",
-    	        "email": "bbbb"
+    	        "email": "bbbb",
+				"tag": "bad"
     	    },
     	    {
     	        "firstName": "Elliotte",
     	        "lastName": "Harold",
-    	        "email": "cccc"
+    	        "email": "cccc",
+				"tag":, "good"
     	    },
 			{
 				"firstName": 1002.3,
@@ -152,10 +155,17 @@ func get(json, path string) Result {
 
 func TestBasic(t *testing.T) {
 	var mtok Result
-
+	mtok = get(basicJSON, `loggy.programmers.#[tag="good"].firstName`)
+	if mtok.String() != "Brett" {
+		t.Fatalf("expected %v, got %v", "Brett", mtok.String())
+	}
+	mtok = get(basicJSON, `loggy.programmers.#[tag="good"]#.firstName`)
+	if mtok.String() != `["Brett","Elliotte"]` {
+		t.Fatalf("expected %v, got %v", `["Brett","Elliotte"]`, mtok.String())
+	}
 	mtok = get(basicJSON, `loggy.programmers.#[age=101].firstName`)
 	if mtok.String() != "1002.3" {
-		t.Fatalf("expected %v, got %v", "1002,3", mtok.String())
+		t.Fatalf("expected %v, got %v", "1002.3", mtok.String())
 	}
 
 	mtok = get(basicJSON, `loggy.programmers.#[firstName == "Brett"].email`)