集合

¥collection

• countBy

• every

• filter

• find

• findLast

• flatMap

• flatMapDeep

• flatMapDepth

• forEach

• forEachRight

• groupBy

• includes

• invokeMap

• keyBy

• map

• orderBy

• partition

• reduce

• reduceRight

• reject

• sample

• sampleSize

• shuffle

• size

• some

• sortBy