[ADD] functions in Julia

04_Functions.jl

@@ -0,0 +1,31 @@
+f(x) = 2x + 1
+
+println(f(3))
+
+"Find the area of a cirle of radius `r`"
+area_circle(r) = 2π*r^2
+
+println(area_circle(1))
+
+x -> 2x + 1
+
+println(map(f,1:3))
+
+g = x -> 2x + 1
+
+a = "aabb"
+b = "acbx"
+
+function hamm_dist(s::String,t)
+    assert(length(s) == length(t))
+    error = 0
+    for (a,b) in zip(s,t)
+        error += a != b ? 1 : 0
+    end
+
+    return error
+end
+
+println(hamm_dist(a,b))
+println(hamm_dist("pal","pål"))
+println(hamm_dist("pål","pal"))