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README.md

@@ -1,2 +1,49 @@
 # glinq
-linq for golang
+LINQ for Golang
+
+examples:
+```go
+var employees = NewListOf([]Employee{
+	{"Hao", 44, 0, 8000.5},
+	{"Bob", 36, 10, 5000.5},
+	{"Alice", 23, 5, 9000.0},
+	{"Jack", 26, 0, 4000.0},
+	{"Tom", 48, 9, 7500.75},
+	{"Marry", 29, 0, 6000.0},
+	{"Mike", 38, 8, 4000.3},
+})
+
+func TestEmployeeList(t *testing.T) {
+	// 添加 Max 员工
+	employees.Push(Employee{"Max", 26, 0, 4000.0})
+	// 所有人的薪水
+	totalPaySalary := Reduce(employees.ToQueryable(), 0.0, func(result float64, employee Employee) float64 {
+		return result + employee.Salary
+	})
+	assert.Equal(t, totalPaySalary, 43502.05+4000.0)
+
+	//统计年龄大于40岁的员工数
+	orderCount := employees.ToQueryable().Where(func(employee Employee) bool {
+		return employee.Age > 35
+	}).Count()
+	assert.Equal(t, orderCount, 4)
+
+	//统计薪水超过 6000元的员工数
+	moreThan6000Count := employees.ToQueryable().Where(func(employee Employee) bool {
+		return employee.Salary >= 6000
+	}).Count()
+	assert.Equal(t, moreThan6000Count, 4)
+
+	//统计年龄小于30岁员工要支付的所有薪水 [ Max: 4000.0, Alice: 9000.0 ,Jack: 4000.0, Marry: 6000.0 ] = 23000.0
+	employeeQuery := employees.ToQueryable()
+	// Reduce are equal Sum of Map to Queryable
+	youngerTotalPaySalary := Reduce(Map(employeeQuery.Where(func(employee Employee) bool {
+		return employee.Age < 30
+	}), func(e Employee) float64 {
+		return e.Salary
+	}), 0.0, func(result float64, item float64) float64 {
+		return result + item
+	})
+	assert.Equal(t, youngerTotalPaySalary, 23000.0)
+}
+```