From 99d967ced6b343708e944e91d2996ca49a4b8728 Mon Sep 17 00:00:00 2001
From: Ivan <DarkSupah@ya.ru>
Date: Thu, 4 Nov 2021 02:46:33 +0500
Subject: [PATCH] Added extension methods for tables and entities, added
 inrange helper to libs

---
 koptilnya/libs/entity.txt |  7 +++++++
 koptilnya/libs/math.txt   |  3 +++
 koptilnya/libs/table.txt  | 31 ++++++++++++++++++++++++++++++-
 3 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 koptilnya/libs/entity.txt
 create mode 100644 koptilnya/libs/math.txt

diff --git a/koptilnya/libs/entity.txt b/koptilnya/libs/entity.txt
new file mode 100644
index 0000000..2db67fe
--- /dev/null
+++ b/koptilnya/libs/entity.txt
@@ -0,0 +1,7 @@
+function getLocalVelocity(entity)
+    if not entity:isValid() then
+        return
+    end
+
+    return entity:worldToLocal(entity:getVelocity() + entity:getPos())
+end
diff --git a/koptilnya/libs/math.txt b/koptilnya/libs/math.txt
new file mode 100644
index 0000000..e90f495
--- /dev/null
+++ b/koptilnya/libs/math.txt
@@ -0,0 +1,3 @@
+function inrange(value, min, max)
+    return value >= min and value <= max
+end
diff --git a/koptilnya/libs/table.txt b/koptilnya/libs/table.txt
index 6e0e583..b34c250 100644
--- a/koptilnya/libs/table.txt
+++ b/koptilnya/libs/table.txt
@@ -1,5 +1,4 @@
 -- @name koptilnya/libs/table
-
 function table.chunk(tbl, size)
     size = size or 1
     size = size > 0 and size or 1
@@ -64,3 +63,33 @@ function table.contains(tbl, ...)
         return result
     end
 end
+
+function table.map(tbl, action)
+    local res = {}
+
+    for _, field in ipairs(tbl) do
+        table.insert(res, action(field))
+    end
+
+    return res
+end
+
+function table.filter(tbl, predicate)
+    local res = {}
+
+    for _, field in ipairs(tbl) do
+        if predicate(field) == true then
+            table.insert(res, field)
+        end
+    end
+
+    return res
+end
+
+function table.find(tbl, predicate)
+    for _, field in ipairs(tbl) do
+        if predicate(field) == true then
+            return field
+        end
+    end
+end