transform snake case in camel case typescript

1
2const toCamelCase = (str: string): string =>{
3     let charsLowerCase = str.toLowerCase().split('');
4     let camelCaseKey = '';
5     for (let pos = 0; pos < charsLowerCase.length; pos++) {
6          if (charsLowerCase[pos] === '_') {
7               let next = pos + 1;
8               charsLowerCase[next] = charsLowerCase[next].toUpperCase();
9               charsLowerCase.splice(pos, 1);
10          }
11          camelCaseKey += charsLowerCase[pos];
12     }
13     return camelCaseKey;
14}
15
16console.log(toCamelCase('hello_world')); 
17// >  helloWorld

1function convertSnakeToCamelSnake(obj: any){
2  let newTokens = []
3  if (obj) {
4    Object.keys(obj).forEach( key => {
5      newTokens = []                                                                // Reset each loop
6      let tokens = key.split('_')
7      tokens.forEach( token => { newTokens.push(capitalizeFirstLetter(token)) });   // Capitalize first letter of each token
8      newTokens.join('')                                                            // Concatenate array indexes to string
9    });
10  }else{
11    console.log("Can not convert case of object:" + obj)
12  }
13  return newTokens
14}