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refactor: make code more explicit, add comment

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This commit is contained in:
Moritz E. Beber 2022-04-05 11:29:39 +02:00
parent 59b2088aa1
commit 39e5e802c7
1 changed files with 3 additions and 1 deletions
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4
subworkflows/local/shortread_adapterremoval.nf
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@ -39,7 +39,9 @@ workflow SHORTREAD_ADAPTERREMOVAL {
ADAPTERREMOVAL_PAIRED.out.paired_truncated
)
.groupTuple()
.map { [it.head(), it.tail().flatten()] }
// Paired-end reads cause a nested tuple during grouping.
// We want to present a flat list of files to `CAT_FASTQ`.
.map { meta, fastq -> [meta, fastq.flatten()] }
CAT_FASTQ(ch_concat_fastq)