Dear all

I would like to load two tab-delimited text files into two separate hashes. These two files are in the following formats:

File 1 

NM_001127328    202502_at
NM_000018    200710_at
NM_000019    205412_at
NM_001111067    203935_at
NM_000023    210632_s_at
NM_000027    204332_s_at
NM_000027    204333_s_at
NM_000027    216064_s_at
NM_000029    202834_at
NM_000031    218487_at
NM_000031    218489_s_at
NM_000032    211560_s_at
NM_000036    206121_at
NM_000042    205216_s_at
NM_000043    204780_s_at
NM_000043    204781_s_at
NM_000043    215719_x_at
NM_000043    216252_x_at
NM_000044    211110_s_at
NM_000044    211621_at

[download]

File 2 

204332_s_at    P    P    A    P    P    P    P
216064_s_at    P    M    P    P    P    A    A
211560_s_at    P    P    P    A    P    P    P
200003_s_at    P    A    P    P    P    A    P
211110_s_at    P    A    P    A    P    A    P
200005_at    P    P    A    P    P    P    A

[download]

First columns in both files serve as keys while the other columns are values. The problem with loading the first file into a hash is that it overwrites the values for the same keys. Is there a way to append the values for the same key hence creating single key - multiple values pairs?

Afterwards, I need to match each key in the first file with the each key in the second file through the values in the first file. I guess If I have a hash for the first file, then I can read through the second hash using three for loops.

Thank you,

In reply to Load a file into hash with duplicate keys by sophix

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