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Viewsstring to dictionary in javascript
I have a string that I want to transform into a dictionary, the string looks like this:
const str = '::student{name="this is the name" age="21" faculty="some faculty"}'
I want to transform that string into a dictionary that looks like this:
const dic = {
"name": "this is the name",
"age": "21",
"faculty": "some faculty"
}
So the string is formated in this was ::name{parameters...} and can have any parameters, not only name, faculty, ... How can I format any string that looks like that and transform it into a dictionary?
Also Is there a way to check that the current string I'm parsing follow this structure ::name{parameters...}, that way I can throw an error when it does not.
Any help would be greatly appreciated!
3 answers
Answer question0
Assuming that you only have alphanumeric and spaces or an empty string within the parentheses of the values, and there is never a space between the key and value in key="value" you can match with the following regular expression and then iterate over it to construct your desired object.
const str = '::student{name="this is the name" age="21" faculty="some faculty"}'
const matches = str.match(/[\w]+\=\"[\w\s]*(?=")/g)
const result = {}
matches.forEach(match => {
const [key, value] = match.split('="')
result[key] = value
})
console.log(result)The regex is composed of the following parts:
You can use https://regexr.com to experiment with your regular expressions. Depending on the string to process, you'll need to refine your regex.
0
This example uses exec to look for matches in the string using a regular expression.
const str = '::student{name="this is the name" age="21" faculty="some faculty"}';
const regex = /([a-z]+)="([a-z0-9 ?]+)"/g;
let match, output = {};
while (match = regex.exec(str)) {
output[match[1]] = match[2];
}
console.log(output);0
You could use 2 patterns. The first pattern to match the format of the string and capture the content between the curly braces in a single capture group. The second pattern to get the key value pairs using 2 capture groups.
For the full match you can use
::\w+{([^{}]*)}
::\w+match::and 1+ word characters{Match the opening curly([^{}]*)Capture group 1, match from opening till closing curly}Match the closing curly
For the keys and values you can use
(\w+)="([^"]+)"
(\w+)Capture group 1, match 1+ word chars="Match literally([^"]+)Capture group 2, match from an opening till closing double quote"Match closing double quote
const str = '::student{name="this is the name" age="21" faculty="some faculty"}';
const regexFullMatch = /::\w+{([^{}]*)}/;
const regexKeyValue = /(\w+)="([^"]+)"/g;
const m = str.match(regexFullMatch);
if (m) {
dic = Object.fromEntries(
Array.from(m[1].matchAll(regexKeyValue), v => [v[1], v[2]])
);
console.log(dic)
}