# Using Core\_kernel.List.mem. And why usingBase&Core instead of stdlib?

**URL:** <https://discuss.ocaml.org/t/using-core-kernel-list-mem-and-why-usingbase-core-instead-of-stdlib/2611>\
**Category:** Learning\
**Tags:** core, stdlib\
**Created:** [September 23, 2018, 11:49pm UTC](https://discuss.ocaml.org/t/using-core-kernel-list-mem-and-why-usingbase-core-instead-of-stdlib/2611 "2018-09-23T23:49:54Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![lindig](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.ocaml.org/lindig/32/532_2.png) [@lindig](https://discuss.ocaml.org/u/lindig)\
**Post date:** [September 24, 2018, 4:43pm UTC](https://discuss.ocaml.org/t/using-core-kernel-list-mem-and-why-usingbase-core-instead-of-stdlib/2611/12 "2018-09-24T16:43:50Z")

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Here is a recent explanation about how modules (OCaml) and packages (Opam) and libraries (findlib) fit (not so much) together: [Connection between libraries in Opam, Dune, and Findlib](https://discuss.ocaml.org/t/connection-between-libraries-in-opam-dune-and-findlib/2536/2)

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_[View the full topic](https://discuss.ocaml.org/t/using-core-kernel-list-mem-and-why-usingbase-core-instead-of-stdlib/2611)._