CODEWITHSUNDEEP
bashcommand-line
ZHU
ZHU

Reputation: 986

Extracting a value to use in a command-line argument from a tab-separated file

If I have a file runtime.tsv as 

preprocessingTime_ms  1164
samplingTime_ms 17741

where the first space is a tab and the second is a space. How can I read samplingTime_ms as an argument to pass on to java?

Basically I need to pass to java like 

java -Xmx2g matching.PermutationESS\ 
        --runtime 17741/1000

to execute in Mac command line.

Upvotes: 0

Views: 150

Answers (1)

tripleee
tripleee

Reputation: 189648

Use a command substitution to interpolate the result of extracting the value from the input file.

java -Xmx2g matching.PermutationESS  --runtime $(
  awk -F '\t' '$1 == "samplingTime_ms" {
    print $NF}' runtime.tsv)/1000

If the second line is space-separated, take out the -F '\t' (this detail is a bit unclear in your question).

If you want the division to be calculated,

java -Xmx2g matching.PermutationESS  --runtime $(
  awk -F '\t' '$1 == "samplingTime_ms" {
    print $NF/1000}' runtime.tsv)

Upvotes: 1

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