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Lookup value of file1 in file2 using a key


 
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# 1  
Lookup value of file1 in file2 using a key

Trying to use awk to match each line in file1 with line in file2 using $1 and $2 and print. File2 is tab-delimeted as is the output and if there is no match then it is skipped. The awk below executes but the output is empty. I think file1 is being split on the : and being saved in array c which looked-up in $1 and $2 of file2. Thank you Smilie.

file1 single column
Code:
chr12:25380271
chr12:25387855

file2 tab-delimeted
Code:
chr12	25380271	COSM27159	C	T	KRAS	NM_033360.3	exonic	c.187G>A	p.Glu63Lys
chr12	25380275	COSM555	T	A	KRAS	NM_033360.3	exonic	c.183A>T	p.Gln61His
chr12	25380275	COSM554	T	G	KRAS	NM_033360.3	exonic	c.183A>C	p.Gln61His

awk
Code:
awk -F':' 'NR==FNR{c[$1$2]++;next};c[$1$2] > 0' file1 file2


desired output
Code:
chr12	25380271	COSM27159	C	T	KRAS	NM_033360.3	exonic	c.187G>A	p.Glu63Lys

# 2  
Code:
awk 'NR==FNR{c[$1]=$1;next} c[$1":"$2]' file1 FS="\t" file2

This User Gave Thanks to rdrtx1 For This Post:
# 3  
You do not need to store any values in the array.
The lookup of the array index is done with in like this
Code:
awk 'NR==FNR{c[$1]; next} ($1":"$2) in c' file1 FS="\t" file2

This User Gave Thanks to MadeInGermany For This Post:
# 4  
Thank you both very much Smilie.

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