Nextflow is an actively used programming language created in 2013.

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  • Nextflow ranks in the top 50% of languages
  • the Nextflow website
  • Nextflow on github
  • Nextflow first appeared in 2013
  • file extensions for Nextflow include nf
  • the Nextflow team is on twitter
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Example code from Linguist:

#!/usr/bin/env nextflow
/*
 * This is free and unencumbered software released into the public domain.
 * 
 * Anyone is free to copy, modify, publish, use, compile, sell, or
 * distribute this software, either in source code form or as a compiled
 * binary, for any purpose, commercial or non-commercial, and by any
 * means.
 * 
 * In jurisdictions that recognize copyright laws, the author or authors
 * of this software dedicate any and all copyright interest in the
 * software to the public domain. We make this dedication for the benefit
 * of the public at large and to the detriment of our heirs and
 * successors. We intend this dedication to be an overt act of
 * relinquishment in perpetuity of all present and future rights to this
 * software under copyright law.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 * 
 * For more information, please refer to <http://unlicense.org/>
 */
 
/* 
 * Author Paolo Di Tommaso <paolo.ditommaso@gmail.com>
 */


params.query = "$HOME/sample.fa"
params.db = "$HOME/tools/blast-db/pdb/pdb"

process blast {
    output:
     file top_hits

    """
    blastp -query ${params.query} -db ${params.db} -outfmt 6 \
    | head -n 10 \
    | cut -f 2 > top_hits
    """
}

process extract {
    input:
     file top_hits
    output:
     file sequences

    """
    blastdbcmd -db ${params.db} -entry_batch $top_hits > sequences
    """
}

process align {
    input:
     file sequences
    echo true

    """
    t_coffee $sequences 2>&- | tee align_result
    """
}

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Last updated December 10th, 2019

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