feat: 0.1.2

1. login page && auth required
  2. file dir cleanup

internal/pkg/tool/loadash.go

@@ -0,0 +1,68 @@
+package tool
+
+import "math"
+
+func Map[T, R any](vals []T, fn func(item T, index int) R) []R {
+	var result = make([]R, len(vals))
+	for idx, v := range vals {
+		result[idx] = fn(v, idx)
+	}
+	return result
+}
+
+func Chunk[T any](vals []T, size int) [][]T {
+	if size <= 0 {
+		panic("Second parameter must be greater than 0")
+	}
+
+	chunksNum := len(vals) / size
+	if len(vals)%size != 0 {
+		chunksNum += 1
+	}
+
+	result := make([][]T, 0, chunksNum)
+
+	for i := 0; i < chunksNum; i++ {
+		last := (i + 1) * size
+		if last > len(vals) {
+			last = len(vals)
+		}
+		result = append(result, vals[i*size:last:last])
+	}
+
+	return result
+}
+
+// 对 vals 取样 x 个
+func Sample[T any](vals []T, x int) []T {
+	if x < 0 {
+		panic("Second parameter can't be negative")
+	}
+
+	n := len(vals)
+	if n == 0 {
+		return []T{}
+	}
+
+	if x >= n {
+		return vals
+	}
+
+	// 处理x=1的特殊情况
+	if x == 1 {
+		return []T{vals[(n-1)/2]}
+	}
+
+	// 计算采样步长并生成结果数组
+	step := float64(n-1) / float64(x-1)
+	result := make([]T, x)
+
+	for i := 0; i < x; i++ {
+		// 计算采样位置并四舍五入
+		pos := float64(i) * step
+		index := int(math.Round(pos))
+		result[i] = vals[index]
+	}
+
+	return result
+}