scala - Extract the word from String using Regex -


i have following

input:

 abc_account2621_activity_20161116_20161117_030627_311999667.csv  xyx_account2622_click_2016111606_20161116_221031_311735299.csv  sed_account2623_impression_2016111605_20161116_221808_311685411.csv  abc_account2621_rich_media_2016111606_20161116_192542_311735300.csv  vbc_account2622_match_table_activity_cats_20161116_20161117_0311_31.csv.gz    sbc_account2622_match_table_activity_types_20161116_20161117_0342_31.csv.gz

expected output

activity click impression rich_media match_table_activity_cats match_table_activity_types

code tried till now:

i want access word lies between [number + (-)underscore , end (-)underscore + number]

 val x = "abc_account2621_match_table_activity_types_20161116_20161117_0342_31.csv.gz"   val pattern3 = "(_([a-za-z]+_[0-9]))".r  var word=pattern3.findfirstin(x).getorelse("no match")  word: string = _types_2 

val x = "abc_account2621_match_table_activity_types_20161116_20161117_0342_31.csv.gz" val pattern3 = """_([a-za-z_]+)_\d+""".r pattern3.findallin(x).matchdata.map(_.group(1)).tolist

_([a-za-z_]+)_\d+ matchdata capture group can capture this.

see regex101 this.


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