Here is a string that needs parsing:
const str = 'map("a")to("b");map("foo")to("bar");map("alpha")to("beta");'
The goal is to generate a JSON structure like this:
[{id: 'a', map: 'b'},
{id: 'foo', map: 'bar'},
{id: 'alpha', map: 'beta'}]
I am considering using regex for this task, but also exploring if there are any useful libraries available for this purpose.
If you're looking for a solution tailored to your specific situation, consider using the following regular expression:
const str = 'map("a")to("b");map("foo")to("bar");map("alpha")to("beta");';
const res = str.split(";").map(e => {
const k = e.match(/map\("(.+?)"\)to\("(.+?)"\)/);
return k && k.length === 3 ? {id: k[1], map: k[2]} : null;
}).filter(e => e);
console.log(res);The technique involves splitting the string on semicolons (with the option to handle semicolons within key/value pairs using lookaheads), then mapping these pairs into an object format defined by a regex that picks apart the map("")to("") structure. Finally, any resulting null elements are removed.
Although I'm aware that there might be a more concise and efficient regex solution, I tend to approach these types of problems in a different way due to my limited knowledge of regex:
const str = 'map("a")to("b");map("foo")to("bar");map("alpha")to("beta");'
const result = str.split(';').map(e => {
const parts = e.substring(3).split('to').map(item => item.replace(/\W/g, ''));
return {
id: parts[0],
map: parts[1]
};
})
console.log(result);
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