Module:Interval edo approximation: Difference between revisions

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@@ Line 2: / Line 2: @@
 -- Calculates EDO approximations for just intervals
 -- Usage: {{#invoke:EDO_Approximations|main|interval=3/2|tolerance=9|min_edo=5|max_edo=60}}
+local u = require("Module:Utils")
 local yesno = require("Module:Yesno")
 local p = {}
@@ Line 14: / Line 15: @@
 -- Python: return 1200 * math.log2(ratio)
 local function cents(ratio)
-    -- Lua doesn't have log2, so use change of base formula
+     return 1200 * u.log2(ratio)
-     return 1200 * (math.log(ratio) / math.log(2))
-end
--- Parse a ratio string like '3/2' into a number
--- Python: parts = ratio_str.strip().split('/'); return float(parts[0]) / float(parts[1])
-local function parse_ratio(ratio_str)
-    -- Strip whitespace (equivalent to Python's strip())
-    ratio_str = ratio_str:match("^%s*(.-)%s*$")
-    -- Split on '/' and parse numerator/denominator
-    local slash_pos = ratio_str:find("/")
-    if not slash_pos then
-        return nil
-    end
-    local num_str = ratio_str:sub(1, slash_pos - 1)
-    local denom_str = ratio_str:sub(slash_pos + 1)
-    local num = tonumber(num_str)
-    local denom = tonumber(denom_str)
-    if not num or not denom or denom == 0 then
-        return nil
-    end
-    -- Return exact division (equivalent to Python's float division)
-    return num / denom
 end
@@ Line 129: / Line 103: @@
      -- Parse interval string to numeric ratio
-     local ratio = parse_ratio(interval_str)
+     local ratio = eval_num_arg(interval_str)
      if not ratio then
          return "Error: Invalid interval format (use format like '3/2')"