How to remove £ symbol from nested array and convert string to integer - regex

Question

I've got a nested array of prices that are a string and I want to remove the £ symbols and convert the string into an integer. I need to strip the £ signs and also convert to a integer so I can use the values in a chart.js line graph.
I've been trying to use regex replace to remove the £ sign but I don't think I can get it working because the strings are in a nested array. I can't seem to find anything on the net about replacing characters in a nested array. I haven't even tried converting the string to an integer yet, but wondering if it could all be handled in one go in someway?
this is my nested array called linedata
var linedata = [["£14.99,£14.99,£14.99"],["£34.99,£34.99,£34.99"]]
this is the code I've been playing around with
var re = /£/g;
var newlinedata = linedata.replace(re, "");
Its not returning anything in chrome console and the ionic CLI is kicking out this error
ERROR in src/app/home/home.page.ts(66,26): error TS2339: Property
'replace' does not exist on type 'any[]'.
Thoughts?

Answer 1

This expression might help you to replace that:
£([0-9.]+,?)
The key is to add everything you like to keep in the capturing group () and the pound symbol outside of the group, then simply replace it with $1.
RegEx
If this wasn't your desired expression, you can modify/change your expressions in regex101.com.
RegEx Circuit
You can also visualize your expressions in jex.im:
JavaScript Demo
const regex = /£([0-9.]+,?)/gm;
const str = `£14.99,£14.99,£14.99
£34.99,£34.99,£34.99`;
const subst = `$1`;
// The substituted value will be contained in the result variable
const result = str.replace(regex, subst);
console.log('Substitution result: ', result);

Answer 2

You could capture in a group matching a digit with an optional decimal part after matching the £
£(\d+(?:\.\d+)?)
£ Match literally
( Capturing group
\d+(?:\.\d+)? Match 1+ digits with an optional part to match a dot and 1+ digits
) Close group
Regex demo
You should use replace on a string instead of an array.
To turn the nested array with the strings into arrays of numbers, you could use map and in the replacement refer to the capturing group using $1 which contains your value.
For example:
var linedata = [
["£14.99,£14.99,£14.99"],
["£34.99,£34.99,£34.99"]
].map(ary =>
ary[0].split(',')
.map(v => Number(v.replace(/£(\d+(?:\.\d+)?)/g, "$1")))
);
console.log(linedata);
Or if you want to keep multiple nested arrays, you could use another map.
var linedata = [
["£14.99,£14.99,£14.99"],
["£34.99,£34.99,£34.99", "£34.99,£34.99,£34.99"]
].map(ary => ary
.map(s => s.split(',')
.map(v => Number(v.replace(/£(\d+(?:\.\d+)?)/g, "$1")))
)
);
console.log(linedata);