CODEWITHSUNDEEP
jsonbash
bhavicp
bhavicp

Reputation: 355

How to check for a value before '.' in BASH

I'm outputting some values to JSON format, and it appears if a value starts with a '.' it isn't valid JSON (The API doesn't seem to like these int's inside " "). What would be the best way to check if my value has anything in front of a '.', and if not, put a 0 there?

i.e

value = .53
newvalue = 0.53

I'm not very good at doing anything more than simple functions in BASH at the moment, still trying to learn awk/sed and other useful things such as cut.

Upvotes: 0

Views: 49

Answers (1)

devnull
devnull

Reputation: 123458

There might be a number of possible solutions given the nature of the input. However, given those unknowns an easy workaround would be to say:

[[ $value == \.* ]] && newvalue=0${value}

Example:

$ value=.42
$ [[ $value == \.* ]] && newvalue=0${value}
$ echo $newvalue
0.42

Upvotes: 1

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