I have a string (mathematical equation):
Wt=mgt
This is what I would like to split them by: ['wt', 'm', 'g', 't']
I would like the result ['Wt', '=', 'm', 'g', t']
I am not sure how to do this.
This should be applicable to all equations inputted. My goal is to have the user input an equation and an array, and split the string into a another array using the initial array they gave me:
split('Wt=mg', ['Wt', 'm', 'g']) // => ['Wt', '=', 'm', 'g']
split('maa=tna', ['ma', 'a', 't', 'n']) // => ['ma', 'a', '=', 't', 'n', 'a']
split('Fnet=ma', ['Fnet', 'm', 'a']) // => ['Fnet', '=', 'm', 'a']
I'm not a master on RegEx so maybe there is a more elegant way to do this, but try this, it seems to work ok with your values:
console.log(splitStr('Wt=mg', ['Wt', 'm', 'g'])) // => ['Wt', '=', 'm', 'g']
console.log(splitStr('maa=tna', ['ma', 'a', 't', 'n'])) // => ['ma', 'a', '=', 't', 'n', 'a']
console.log(splitStr('Fnet=ma', ['Fnet', 'm', 'a'])) // => ['Fnet', '=', 'm', 'a']
function splitStr(string, array){
const matches = `(${array.join("|")}|=)`
return string.split(new RegExp(matches)).filter(f => f != '')
}The trick here is to create a regex with stucture (value1|valueN|=) with all values in the array and then split by these values.
For the first case you can use something like this.
let str = "Wt=mgt"
let strArr = str.split("=")
let res = [strArr[0], ...strArr[1].split("")];
console.log(res)For the second result you can use the above method and just insert the "=" in between.
let str = "Wt=mgt"
let strArr = str.split("=")
let res = [strArr[0],"=", ...strArr[1].split("")];
console.log(res)I am not entriely sure what your requirement here but you can do something like this:
List<String> final = new ArrayList<String>();
String toAdd = "";
for (int i = 0; i < s.length(); i++){
int c = (int) s.charAt(i);
if((c > 32 && c < 47) || (c > 58 && c < 64) || (c > 91 && c < 96) || (c > 123 && c < 126)){
final.push(toAdd);
final.push(s.charAt(i));
}
else{
toAdd += s.charAt(i);
}
}