# 常见函数操作

- [A](/scala/function-operation/a.md)
- [aggregate](/scala/function-operation/a/aggregate.md)
- [andThen](/scala/function-operation/a/andthen.md)
- [appended](/scala/function-operation/a/appended.md)
- [appendedAll](/scala/function-operation/a/appendedall.md)
- [C](/scala/function-operation/c.md)
- [chain](/scala/function-operation/c/chain.md)
- [collect](/scala/function-operation/c/collect.md)
- [collectFirst](/scala/function-operation/c/collectfirst.md)
- [combinations](/scala/function-operation/c/combinations.md)
- [compose](/scala/function-operation/c/compose.md)
- [concat](/scala/function-operation/c/concat.md)
- [cond](/scala/function-operation/c/cond.md)
- [condOpt](/scala/function-operation/c/condopt.md)
- [const](/scala/function-operation/c/const.md)
- [contains](/scala/function-operation/c/contains.md)
- [containsSlice](/scala/function-operation/c/containsslice.md)
- [copyToArray](/scala/function-operation/c/copytoarray.md)
- [corresponds](/scala/function-operation/c/corresponds.md)
- [count](/scala/function-operation/c/count.md)
- [curried](/scala/function-operation/c/curried.md)
- [D](/scala/function-operation/d.md)
- [diff](/scala/function-operation/d/diff.md)
- [distinct](/scala/function-operation/d/distinct.md)
- [distinctBy](/scala/function-operation/d/distinctby.md)
- [drop](/scala/function-operation/d/drop.md)
- [dropRight](/scala/function-operation/d/dropright.md)
- [dropWhile](/scala/function-operation/d/dropwhile.md)
- [E](/scala/function-operation/e.md)
- [empty(PartialFunction)](/scala/function-operation/e/empty-partialfunction.md)
- [empty(collections)](/scala/function-operation/e/empty-collections.md)
- [endsWith](/scala/function-operation/e/endswith.md)
- [exists](/scala/function-operation/e/exists.md)
- [F](/scala/function-operation/f.md)
- [fill](/scala/function-operation/f/fill.md)
- [filter](/scala/function-operation/f/filter.md)
- [filterKeys](/scala/function-operation/f/filterkeys.md)
- [filterNot](/scala/function-operation/f/filternot.md)
- [find](/scala/function-operation/f/find.md)
- [findLast](/scala/function-operation/f/findlast.md)
- [flatMap](/scala/function-operation/f/flatmap.md)
- [flatten](/scala/function-operation/f/flatten.md)
- [fold](/scala/function-operation/f/fold.md)
- [foldLeft](/scala/function-operation/f/foldleft.md)
- [foldRight](/scala/function-operation/f/foldright.md)
- [forall](/scala/function-operation/f/forall.md)
- [foreach](/scala/function-operation/f/foreach.md)
- [fromFunction](/scala/function-operation/f/fromfunction.md)
- [G](/scala/function-operation/g.md)
- [getOrElse (Map)](/scala/function-operation/g/getorelse-map.md)
- [getOrElse (Option)](/scala/function-operation/g/getorelse-option.md)
- [groupBy](/scala/function-operation/g/groupby.md)
- [groupMap](/scala/function-operation/g/groupmap.md)
- [groupMapReduce](/scala/function-operation/g/groupmapreduce.md)
- [grouped](/scala/function-operation/g/grouped.md)
- [H](/scala/function-operation/h.md)
- [head](/scala/function-operation/h/head.md)
- [headOption](/scala/function-operation/h/headoption.md)
- [I](/scala/function-operation/i.md)
- [indexOf](/scala/function-operation/i/indexof.md)
- [indexOfSlice](/scala/function-operation/i/indexofslice.md)
- [indexWhere](/scala/function-operation/i/indexwhere.md)
- [indices](/scala/function-operation/i/indices.md)
- [init](/scala/function-operation/i/init.md)
- [inits](/scala/function-operation/i/inits.md)
- [intersect](/scala/function-operation/i/intersect.md)
- [isDefinedAt (Map)](/scala/function-operation/i/isdefinedat-map.md)
- [isDefinedAt (Seq)](/scala/function-operation/i/isdefinedat-seq.md)
- [isEmpty](/scala/function-operation/i/isempty.md)
- [isTraversableAgain](/scala/function-operation/i/istraversableagain.md)
- [K](/scala/function-operation/k.md)
- [keys](/scala/function-operation/k/keys.md)
- [L](/scala/function-operation/l.md)
- [last](/scala/function-operation/l/last.md)
- [lastIndexOf](/scala/function-operation/l/lastindexof.md)
- [lastIndexOfSlice](/scala/function-operation/l/lastindexofslice.md)
- [lastIndexWhere](/scala/function-operation/l/lastindexwhere.md)
- [lastOption](/scala/function-operation/l/lastoption.md)
- [length](/scala/function-operation/l/length.md)
- [lift](/scala/function-operation/l/lift.md)
- [M](/scala/function-operation/m.md)
- [map](/scala/function-operation/m/map.md)
- [mapConserve](/scala/function-operation/m/mapconserve.md)
- [mapValues](/scala/function-operation/m/mapvalues.md)
- [max](/scala/function-operation/m/max.md)
- [maxBy](/scala/function-operation/m/maxby.md)
- [maxByOption](/scala/function-operation/m/maxbyoption.md)
- [maxOption](/scala/function-operation/m/maxoption.md)
- [min](/scala/function-operation/m/min.md)
- [minBy](/scala/function-operation/m/minby.md)
- [minByOption](/scala/function-operation/m/minbyoption.md)
- [minOption](/scala/function-operation/m/minoption.md)
- [mkString](/scala/function-operation/m/mkstring.md)
- [N](/scala/function-operation/n.md)
- [nonEmpty](/scala/function-operation/n/nonempty.md)
- [O](/scala/function-operation/o.md)
- [orElse](/scala/function-operation/o/orelse.md)
- [P](/scala/function-operation/p.md)
- [padTo](/scala/function-operation/p/padto.md)
- [par](/scala/function-operation/p/par.md)
- [partition](/scala/function-operation/p/partition.md)
- [partitionMap](/scala/function-operation/p/partitionmap.md)
- [patch](/scala/function-operation/p/patch.md)
- [permutations](/scala/function-operation/p/permutations.md)
- [prefixLength](/scala/function-operation/p/prefixlength.md)
- [prepended](/scala/function-operation/p/prepended.md)
- [prependedAll](/scala/function-operation/p/prependedall.md)
- [product](/scala/function-operation/p/product.md)
- [R](/scala/function-operation/r.md)
- [range](/scala/function-operation/r/range.md)
- [reduce](/scala/function-operation/r/reduce.md)
- [reduceLeft](/scala/function-operation/r/reduceleft.md)
- [reduceLeftOption](/scala/function-operation/r/reduceleftoption.md)
- [reduceOption](/scala/function-operation/r/reduceoption.md)
- [reduceRight](/scala/function-operation/r/reduceright.md)
- [reduceRightOption](/scala/function-operation/r/reducerightoption.md)
- [reverse](/scala/function-operation/r/reverse.md)
- [reverseIterator](/scala/function-operation/r/reverseiterator.md)
- [reverseMap](/scala/function-operation/r/reversemap.md)
- [runWith](/scala/function-operation/r/runwith.md)
- [S](/scala/function-operation/s.md)
- [sameElements](/scala/function-operation/s/sameelements.md)
- [scan](/scala/function-operation/s/scan.md)
- [scanLeft](/scala/function-operation/s/scanleft.md)
- [scanRight](/scala/function-operation/s/scanright.md)
- [search](/scala/function-operation/s/search.md)
- [segmentLength](/scala/function-operation/s/segmentlength.md)
- [size](/scala/function-operation/s/size.md)
- [slice](/scala/function-operation/s/slice.md)
- [sliding](/scala/function-operation/s/sliding.md)
- [sortBy](/scala/function-operation/s/sortby.md)
- [sortWith](/scala/function-operation/s/sortwith.md)
- [sorted](/scala/function-operation/s/sorted.md)
- [span](/scala/function-operation/s/span.md)
- [splitAt](/scala/function-operation/s/splitat.md)
- [startsWith](/scala/function-operation/s/startswith.md)
- [sum](/scala/function-operation/s/sum.md)
- [T](/scala/function-operation/t.md)
- [tabulate](/scala/function-operation/t/tabulate.md)
- [tail](/scala/function-operation/t/tail.md)
- [tails](/scala/function-operation/t/tails.md)
- [take](/scala/function-operation/t/take.md)
- [takeRight](/scala/function-operation/t/takeright.md)
- [takeWhile](/scala/function-operation/t/takewhile.md)
- [transpose](/scala/function-operation/t/transpose.md)
- [tupled](/scala/function-operation/t/tupled.md)
- [U](/scala/function-operation/u.md)
- [unfold](/scala/function-operation/u/unfold.md)
- [union](/scala/function-operation/u/union.md)
- [unlift](/scala/function-operation/u/unlift.md)
- [untupled](/scala/function-operation/u/untupled.md)
- [unzip](/scala/function-operation/u/unzip.md)
- [unzip3](/scala/function-operation/u/unzip3.md)
- [updated](/scala/function-operation/u/updated.md)
- [V](/scala/function-operation/v.md)
- [values](/scala/function-operation/v/values.md)
- [view](/scala/function-operation/v/view.md)
- [W](/scala/function-operation/w.md)
- [withFilter](/scala/function-operation/w/withfilter.md)
- [withDefault](/scala/function-operation/w/withdefault.md)
- [withDefaultValue](/scala/function-operation/w/withdefaultvalue.md)
- [Z](/scala/function-operation/z.md)
- [zip](/scala/function-operation/z/zip.md)
- [zipAll](/scala/function-operation/z/zipall.md)
- [zipWithIndex](/scala/function-operation/z/zipwithindex.md)
- [map](/scala/function-operation/map.md)
- [flatmap](/scala/function-operation/flatmap.md)
- [filter](/scala/function-operation/filter.md)
- [reduceLeft](/scala/function-operation/reduceleft.md)
- [foldLeft](/scala/function-operation/foldleft.md)