Add Hash::Merge::Unit

2 files changed, 85 insertions, 23 deletions

diff --git a/META6.json b/META6.json
index c49c3f8..97adef3 100644
--- a/META6.json
+++ b/META6.json
@@ -1,25 +1,27 @@
 {
-    "perl": "6",
-    "name": "Hash::Merge",
-    "version": "0.2.0",
-    "auth": "github:scriptkitties",
-    "description": "Module to add deep merge functionality to Hashes",
-    "license": "Artistic-2.0",
-    "depends": [
-    ],
-    "provides": {
-        "Hash::Merge": "lib/Hash/Merge.pm6"
-    },
-    "authors": [
-        "Samantha McVey <samantham@posteo.net>",
-        "Patrick Spek <p.spek@tyil.work>"
-    ],
-    "tags": [
-        "hash",
-        "utils"
-    ],
-    "test-depends": [
-        "Test::META"
-    ],
-    "source-url": "https://github.com/scriptkitties/p6-Hash-Merge.git"
+  "auth": "github:scriptkitties",
+  "authors": [
+    "Samantha McVey <samantham@posteo.net>",
+    "Patrick Spek <p.spek@tyil.work>"
+  ],
+  "depends": [
+    
+  ],
+  "description": "Module to add deep merge functionality to Hashes",
+  "license": "Artistic-2.0",
+  "name": "Hash::Merge",
+  "perl": "6",
+  "provides": {
+    "Hash::Merge": "lib/Hash/Merge.pm6",
+    "Hash::Merge::Unit": "lib/Hash/Merge/Unit.pm6"
+  },
+  "source-url": "https://github.com/scriptkitties/p6-Hash-Merge.git",
+  "tags": [
+    "hash",
+    "utils"
+  ],
+  "test-depends": [
+    "Test::META"
+  ],
+  "version": "0.2.0"
 }
diff --git a/lib/Hash/Merge/Unit.pm6 b/lib/Hash/Merge/Unit.pm6
new file mode 100644
index 0000000..5c1d016
--- /dev/null
+++ b/lib/Hash/Merge/Unit.pm6
@@ -0,0 +1,60 @@
+#! /usr/bin/env false
+
+use v6;
+
+unit module Hash::Merge::Unit;
+
+#| Merge any number of Hashes together.
+sub merge-hashes(
+    *@hashes, #= Hashes to merge together
+    --> Hash
+) is export {
+    my %merge-into = @hashes.shift;
+
+    # Nothing to do if we only got 1 argument
+    return %merge-into unless @hashes.elems;
+
+    for ^@hashes.elems {
+        %merge-into = merge-hash(%merge-into, @hashes.shift);
+    }
+
+    %merge-into;
+}
+
+#| Merge two hashes together.
+sub merge-hash(
+    %merge-into,   #= The original Hash that should be merged into.
+    %merge-source, #= Another Hash to merge into the original Hash.
+    Bool:D :$no-append-array = False,
+    --> Hash
+) is export {
+    for %merge-source.keys -> $key {
+        if %merge-into{$key}:exists {
+            given %merge-source{$key} {
+                when Hash {
+                    merge-hash(%merge-into{$key}, %merge-source{$key}, :$no-append-array);
+                }
+                when Positional {
+                    %merge-into{$key} = $no-append-array
+                    ?? %merge-source{$key}
+                    !!
+                    do {
+                        my @a;
+                        @a.push: $_ for %merge-into{$key}.list;
+                        @a.push: $_ for %merge-source{$key}.list;
+                        @a;
+                    }
+                }
+                default {
+                    %merge-into{$key} = %merge-source{$key}
+                }
+            }
+        } else {
+            %merge-into{$key} = %merge-source{$key};
+        }
+    }
+
+    %merge-into;
+}
+
+# vim: ft=perl6 ts=4 sw=4 et