# 常用的方法

- [concat:](/fend/di-san-fang-ku/rac-ku/reactiveobjc/guan-jian-gai-nian-lie-biao/racsignal-you-guan-lei/racsignal/chang-yong-de-fang-fa/concat.md)
- [bind:](/fend/di-san-fang-ku/rac-ku/reactiveobjc/guan-jian-gai-nian-lie-biao/racsignal-you-guan-lei/racsignal/chang-yong-de-fang-fa/bind.md)
- [zipWith 和merge](/fend/di-san-fang-ku/rac-ku/reactiveobjc/guan-jian-gai-nian-lie-biao/racsignal-you-guan-lei/racsignal/chang-yong-de-fang-fa/zipwith-he-merge.md)
