Just another update

Task/Runtime-evaluation-In-an-environment/Bracmat/runtime-evaluation-in-an-environment.bracmat

@@ -0,0 +1,9 @@
+( ( eval-with-x
+  =   code a b argument
+    .   !arg:((=?code),?a,?b,?argument)
+      &   (!b:?x&!code$!argument)
+        + -1*(!a:?x&!code$!argument)
+  )
+& out$(eval-with-x$((='(.$x^!arg)),3,5,2))
+& out$(eval-with-x$((='(.$x^!arg)),12,13,2))
+);

Task/Runtime-evaluation-In-an-environment/Lua/runtime-evaluation-in-an-environment-2.lua

@@ -0,0 +1,7 @@
+env = {}
+f = load("return x", nil, nil, env)
+env.x = tonumber(io.read()) -- user enters 2
+a = f()
+env.x = tonumber(io.read()) -- user enters 3
+b = f()
+print(a + b) --> outputs 5

Task/Runtime-evaluation-In-an-environment/MATLAB/runtime-evaluation-in-an-environment.m

@@ -0,0 +1,7 @@
+function r = calcit(f, val1, val2)
+  x = val1;
+  a = eval(f);
+  x = val2;
+  b = eval(f);
+  r = b-a;
+end