flow like the river

VISUALIZACION/node_modules/uniq/uniq.js

@@ -0,0 +1,57 @@
+"use strict"
+
+function unique_pred(list, compare) {
+  var ptr = 1
+    , len = list.length
+    , a=list[0], b=list[0]
+  for(var i=1; i<len; ++i) {
+    b = a
+    a = list[i]
+    if(compare(a, b)) {
+      if(i === ptr) {
+        ptr++
+        continue
+      }
+      list[ptr++] = a
+    }
+  }
+  list.length = ptr
+  return list
+}
+
+function unique_eq(list) {
+  var ptr = 1
+    , len = list.length
+    , a=list[0], b = list[0]
+  for(var i=1; i<len; ++i, b=a) {
+    b = a
+    a = list[i]
+    if(a !== b) {
+      if(i === ptr) {
+        ptr++
+        continue
+      }
+      list[ptr++] = a
+    }
+  }
+  list.length = ptr
+  return list
+}
+
+function unique(list, compare, sorted) {
+  if(list.length === 0) {
+    return list
+  }
+  if(compare) {
+    if(!sorted) {
+      list.sort(compare)
+    }
+    return unique_pred(list, compare)
+  }
+  if(!sorted) {
+    list.sort()
+  }
+  return unique_eq(list)
+}
+
+module.exports = unique