[2.4.1 make, len, cap, new, nil](2.4.1make,len,cap,new,nil.md) [2.4.1 make, len, cap, new, nil (补充:nil)](2.4.1make,len,cap,new,nil%E8%A1%A5%E5%85%85nil.md) [2.4.2 数组 array](2.4.2%E6%95%B0%E7%BB%84array.md) [2.4.3.1 切片 slice - 1](2.4.3.1%E5%88%87%E7%89%87slice-1.md) [2.4.3.2 切片 slice - 2](2.4.3.2%E5%88%87%E7%89%87slice-2.md) [2.4.3.3 slice list ring](2.4.3.3slicelistring.md) [2.4.4 集合 map](2.4.4%E9%9B%86%E5%90%88map.md) [2.4.5 goroutine](2.4.5goroutine.md) [2.4.6 channel](2.4.6channel.md)