JavaScript: regex CamelCase to Sentence

camelcasing, javascript, regex

Solution

The very last version:

"thisIsNotAPain"
    .replace(/^[a-z]|[A-Z]/g, function(v, i) {
        return i === 0 ? v.toUpperCase() : " " + v.toLowerCase();
    });  // "This is not a pain"

The old solution:

"thisIsAPain"
    .match(/^(?:[^A-Z]+)|[A-Z](?:[^A-Z]*)+/g)
    .join(" ")
    .toLowerCase()
    .replace(/^[a-z]/, function(v) {
        return v.toUpperCase();
    });  // "This is a pain"

console.log(
    "thisIsNotAPain"
        .replace(/^[a-z]|[A-Z]/g, function(v, i) {
            return i === 0 ? v.toUpperCase() : " " + v.toLowerCase();
        })  // "This is not a pain" 
);

console.log(
    "thisIsAPain"
        .match(/^(?:[^A-Z]+)|[A-Z](?:[^A-Z]*)+/g)
        .join(" ")
        .toLowerCase()
        .replace(/^[a-z]/, function(v) {
            return v.toUpperCase();
        })  // "This is a pain"
);

Problem

I've found this example to change CamelCase to Dashes. I've modified to code to change CamelCase to Sentencecase with spaces instead of dashes. It works fine but not for one word letters, like "i" and "a". Any ideas how to incorporate that as well? thisIsAPain --> This is a pain ``` var str = "thisIsAPain"; str = camelCaseToSpacedSentenceCase(str); alert(str) function camelCaseToSpacedSentenceCase(str) { var spacedCamel = str.replace(/\W+/g, " ").replace(/([a-z\d])([A-Z])/g, "$1 $2"); spacedCamel = spacedCamel.toLowerCase(); spacedCamel = spacedCamel.substring(0,1).toUpperCase() + spacedCamel.substring(1,spacedCamel.length) return spacedCamel; } ```

Original source