CODEWITHSUNDEEP
javascriptregexsed
user2802557
user2802557

Reputation: 815

Replace function calls using regex

I have this function that works like this

Add(1,2);
Add(3,4);

And need to replace with this

Add({num1 : 1, num2 : 2});
Add({num1 : 3, num2 : 4});

This happens in hundreds of places across multiple files so I want to write a script that can do this for me.

Using regex I can find the places where this happens

/Add\(.*\);/

But I'm not sure how to replace the inside of the function call with what I need.

I'm not sure also what the best langauge to use to write the script. I was going to use JavasScript to write it in node but would use Bash with sed if there is an easy solution there.

Upvotes: 2

Views: 1065

Answers (4)

SLePort
SLePort

Reputation: 15461

This should work for you :

sed -i 's/Add(\([0-9]*\),\([0-9]*\))/Add({num1 : \1, num2 : \2})/' file

The -i option is for editing the file in place.

Upvotes: 0

Kalanidhi
Kalanidhi

Reputation: 5092

Try this sed method 

sed 's/\([^(]\+.\)\([^,]\+.\)\([^)]\+\)\(.*\)/\1{num1 : \2,num2 : \3}\4/g' FileName

Upvotes: 0

Nina Scholz
Nina Scholz

Reputation: 386680

You could use replace with an appropriate string.

var regex= /(Add\()(\d+),(\d+)(\))/g,
    replace = '$1{num1: $2, num2: $3}$4'

console.log('Add(3,4);'.replace(regex, replace));

Upvotes: 2

José Castro
José Castro

Reputation: 671

I would go with:

perl -i -pe 's/Add\((\d+),(\d+)\)/Add({num1 : $1, num2 : $2})/' filename

Regarding your regular expression, it's not complete, and /Add\((\d+),(\d+)\)/ will take care of catching the instruction and capturing the first and second numbers into $1 and $2, respectively.

The flags work as follows:

  • -i does in-place edit (this will rewrite your file; if you're not comfortable with that either remove the flag to look at the output or use -i.bak to create a backup of your file
  • -p parses each line and prints it in the end
  • -e (from "eval") is what allows you to run a one-liner instead of a script

Upvotes: 1

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