How do you check whether a string contains all alphabets in javascript?
This is the simplest solution I found. It returns Show
Here is the code I found:
Any other simpler form of checking to see if a string contains all of the letters in the alphabet would be helpful. Thanks!
Andria 4,0122 gold badges21 silver badges37 bronze badges asked Mar 23, 2019 at 6:45
6 You don't need to splitAs it would turn out, you don't need to run Example:
This works just as well because something like
On a side note, you can see that I've removed the answered Mar 23, 2019 at 7:19
AndriaAndria 4,0122 gold badges21 silver badges37 bronze badges 1 You can avoid the regex and also return early from the function once you have all the letters with something like this. It creates a set of all the letters and removes them as you find them. Once the set is empty you can return. If the loop finishes, you didn't remove everything. This only requires space for the alphabet set and since set operations are constant time, this is O(n) in the worst case.
answered Mar 23, 2019 at 7:08
MarkMark 86.7k6 gold badges96 silver badges140 bronze badges 3 This is the simplest code I found, It returns true or false for the given string mentioning the string contains all the alphabet in it or not.
Example:
Any other simplest form of code can be helpful. Please share it. Thanks! answered Mar 23, 2019 at 6:50
rockey91rockey91 1322 silver badges10 bronze badges 3 I believe this is the "simplest" w.r.t. computational complexity, requiring
answered Mar 23, 2019 at 6:50
DaiDai 131k25 gold badges231 silver badges336 bronze badges 1
As I look at it again, I can provide one tiny improvement to your code:
Remove the 'i' flag on the regex because it's lowercased. answered Mar 23, 2019 at 7:11
Chris HappyChris Happy 6,7731 gold badge20 silver badges44 bronze badges 1 Here is a different way to due it using
Or you can hardcode all the alphabets.
answered Mar 23, 2019 at 7:40
Maheer AliMaheer Ali 34.7k5 gold badges38 silver badges67 bronze badges
Here is another way using a for...of loop. answered Dec 22, 2019 at 23:25
How do you check if a string contains all alphabets in JS?Checking for all letters. Javascript function to check for all letters in a field function allLetter(inputtxt) { var letters = /^[A-Za-z]+$/; if(inputtxt.value.match(letters)) { return true; } else { alert("message"); return false; } } ... . Flowchart:. HTML Code
How do you check whether a string contains all alphabets?To check if String contains only alphabets in Java, call matches() method on the string object and pass the regular expression "[a-zA-Z]+" that matches only if the characters in the given string is alphabets (uppercase or lowercase).
How do you check if a string contains only alphabets and numbers in JavaScript?The RegExp test() Method
To check if a string contains only letters and numbers in JavaScript, call the test() method on this regex: /^[A-Za-z0-9]*$/ . If the string contains only letters and numbers, this method returns true . Otherwise, it returns false .
How do you check if all characters in string are numbers JavaScript?To check if a string contains numbers in JavaScript, call the test() method on this regex: /\d/ . test() will return true if the string contains numbers. Otherwise, it will return false . The RegExp test() method searches for a match between a regular expression and a string.
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