init

util/strings.go

@@ -0,0 +1,57 @@
+package util
+
+import (
+	"strings"
+)
+
+func CapitalizeFirst(s string) string {
+	if len(s) == 0 {
+		return s
+	}
+	return strings.ToUpper(s[:1]) + s[1:]
+}
+
+// A StringTabulator aligns columns similarly to the tabulator
+// character (but 100% rigorously).
+type StringTabulator [][]string
+
+func (t *StringTabulator) WriteRow(cols ...string) {
+	*t = append(*t, cols)
+}
+
+func (t *StringTabulator) String() string {
+	if t == nil {
+		return ""
+	}
+
+	// Find which row has the most columns.
+	longestRow := 0
+	for _, row := range *t {
+		if len(row) > longestRow {
+			longestRow = len(row)
+		}
+	}
+
+	// For each column, find the field with the longest string.
+	longestField := make([]int, longestRow)
+	for _, row := range *t {
+		for i, col := range row {
+			if len(col) > longestField[i] {
+				longestField[i] = len(col)
+			}
+		}
+	}
+
+	// Add each line tabulated.
+	var res strings.Builder
+	for _, row := range *t {
+		for i, col := range row {
+			res.WriteString(col)
+			res.WriteString(strings.Repeat(" ", longestField[i]-len(col)))
+		}
+		res.WriteString("\n")
+	}
+
+	// Return the result.
+	return res.String()
+}