check if string contains substring

let string = "hello Swift"
if string.contains("Swift") {
    print("exists")
}

3.6
5
Stoicfury 115 points

                                    const string = "javascript";
const substring = "script";

console.log(string.includes(substring));  //true

3.6 (5 Votes)
0
4
9
Cyker 130 points

                                    Like this:

if (str.indexOf("Yes") >= 0)
...or you can use the tilde operator:

if (~str.indexOf("Yes"))
This works because indexOf() returns -1 if the string wasn't found at all.

Note that this is case-sensitive.
If you want a case-insensitive search, you can write

if (str.toLowerCase().indexOf("yes") >= 0)
Or:

if (/yes/i.test(str))

4 (9 Votes)
0
3.5
2

                                    if (typeof myVar === 'string') { /* code */ };

3.5 (2 Votes)
0
4.22
11
Wborbaneto 105 points

                                    const string = "foo";
const substring = "oo";

console.log(string.includes(substring));

4.22 (9 Votes)
0
0
2

                                    if (str.indexOf("Yes") >= 0)
  
  //case insensitive version
  if (str.toLowerCase().indexOf("yes") >= 0)

0
0
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