Added ToFixedCruncate

btm6084 · May 22, 2023 · 8b6eb70 · 8b6eb70
1 parent e6751d0
commit 8b6eb70
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Showing 2 changed files with 16 additions and 1 deletion.
diff --git a/conv/conv.go b/conv/conv.go
@@ -26,12 +26,18 @@ func Round(num float64) int {
 	return int(num + math.Copysign(0.5, num))
 }
 
-// ToFixed will set a fixed precision on a float.
+// ToFixed will set a fixed precision on a float. Rounded
 func ToFixed(num float64, precision int) float64 {
 	output := math.Pow(10, float64(precision))
 	return float64(Round(num*output)) / output
 }
 
+// ToFixedTruncate will set a fixed precision on a float. Not rounded, just truncated
+func ToFixedTruncate(num float64, precision int) float64 {
+	output := math.Pow(10, float64(precision))
+	return float64(int(num*output)) / output
+}
+
 func ZeroIfNilInt(in *int) int {
 	if in == nil {
 		return 0

diff --git a/conv/conv_test.go b/conv/conv_test.go
@@ -67,6 +67,15 @@ func TestToFixed(t *testing.T) {
 	require.Equal(t, 0.3, ToFixed(a+b, 1))
 }
 
+func TestToFixedTruncate(t *testing.T) {
+	require.Equal(t, 9.0, ToFixedTruncate(9.06514265000000007, 0))
+	require.Equal(t, 9.0, ToFixedTruncate(9.06514265000000007, 1))
+	require.Equal(t, 9.06, ToFixedTruncate(9.06514265000000007, 2))
+	require.Equal(t, 9.065, ToFixedTruncate(9.06514265000000007, 3))
+	require.Equal(t, 9.0651, ToFixedTruncate(9.06514265000000007, 4))
+	require.Equal(t, 9.06514, ToFixedTruncate(9.06514265000000007, 5))
+}
+
 func TestFormatDuration(t *testing.T) {
 	testCases := []struct {
 		Label    string