dataset - Regex to match a repeating pattern between two strings -


i have dataset repeating pattern:

---- mv: oxford , cambridge university boat race (1895) sd: 30 march 1895 -  ---- mv: awakening of rip (1896) cp: american mutoscope company; 4 february 1897; 9237 (in copyright registry)  pd: august 1896 - august 1896  ---- mv: chegada comboio inaugural à estação central porto (1897) pd: 7 november 1896 -  ---- mv: exit of rip , dwarf (1896) cp: american mutoscope , biograph co.; 9 december 1902; h24875 (in copyright registry)  pd: august 1896 - august 1896  ----

now, i'd take what's between first ---- , next ---- string , change \n \t, each entry in same line tab separated. each entry separated ---- easier read in. in end should like:

---- mv: oxford , cambridge university boat race (1895)    sd: 30 march 1895 -  ---- mv: awakening of rip (1896) cp: american mutoscope company; 4 february 1897; 9237 (in copyright registry)   pd: august 1896 - august 1896  ---- mv: chegada comboio inaugural à estação central porto (1897)    pd: 7 november 1896 -  ---- mv: exit of rip , dwarf (1896)    cp: american mutoscope , biograph co.; 9 december 1902; h24875 (in copyright registry)    pd: august 1896 - august 1896  ----

i tried positive lookbehind patterns, no luck.

you want both negative lookaheads , lookbehinds. this:

(?<!----)\n(?!----)

then replace matches \t , you're done.

demo on regex101 (modification of yours)


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