Swift Checking if entire word is present in a string [duplicate] - ios

Question

This question already has answers here:
Detect whole word in NSStrings
(4 answers)
Closed 6 years ago.
What I want to do is to check if an entire word is present in a string. Let me give you an example.
let mainString = "this is a my string"
let searchString = "str"
if mainString.containsString(searchString) {
}
Here this condition will be true but I do not want this. I want it to be true when either "this" or "is" or "a" or "my" or "string" is searched in the mainString meaning I want to compare the whole word not the characters within the string. I hope I have elaborated it.

Answer 1

// The following method will return a string without punctuation and non-required stuff characters
Source of information : How to remove special characters from string in Swift 2?
func removeSpecialCharsFromString(mainString) -> String {
let okayChars : Set<Character> =
Set("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLKMNOPQRSTUVWXYZ".characters)
return String(text.characters.filter {okayChars.contains($0) })
}
let stringWithoutSpecialChars = removeSpecialCharsFromString(mainString)
// Source of info : Chris's answer on this page
let components = stringWithoutSpecialChars.componentsSeparatedByString(" ")
for component in components {
print(component)
}

Answer 2

You have to use a Regex like that :
NSString *pattern = #"\\str\\b";
NSRange range = [text rangeOfString:pattern options:NSRegularExpressionSearch|NSCaseInsensitiveSearch];
The \b at the end of the pattern do what you want, it will match only whole words.

Answer 3

I would recommend splitting your string into components and seeing if a component matches your string. Below is a method that uses components to check if any word matches a given search term.
func isTermInString(term:String, stringToSearch:String) -> Bool {
let components = stringToSearch.componentsSeparatedByString(" ")
for component in components {
if component == term {
return true
}
}
return false
}