Let's say I have a paragraph that says 55+5. I want to have JavaScript return everything before the plus. Is this possible using substrings?
Do you mean substring instead of subscript? If so. Then yes.
var string = "55+5"; // Just a variable for your input.
function getBeforePlus(str){
return str.substring(0, str.indexOf("+"));
/* This gets a substring from the beginning of the string
to the first index of the character "+".
*/
}
Otherwise, I recommend using the String.split() method.
You can use that like so.
var string = "55+5"; // Just a variable for your input.
function getBeforePlus(str){
return str.split("+")[0];
/* This splits the string into an array using the "+"
character as a delimiter.
Then it gets the first element of the split string.
*/
}
Yes. Try the String.split method: https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/String/split
split() returns an array of strings, split by the character you pass to it (in your case, the plus). Just use the first element of the array; it will have everything before the plus:
var string = "foo-bar-baz"
var splitstring = string.split('-')
//splitstring is a 3 element array with the elements 'foo', 'bar', and 'baz'
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.