How can check the entered input is a valid question format using jquery ?
for eg: i have a string "How are you ?" . and i need to identify whether it is a
question or not .Do that all i need is to check whether the string ends with '?' ?. Thanks .
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1What have you tried to solve your problem? FYI, it has nothing to do with jQuery.VisioN– VisioN2014-06-30 11:39:38 +00:00Commented Jun 30, 2014 at 11:39
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And what about languages like Spanish, where it seems a question should be preceded by '¿' as well as succeeded by '?'David Thomas– David Thomas2014-06-30 11:42:26 +00:00Commented Jun 30, 2014 at 11:42
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I dont keep this question downvoted then , delete itKTM– KTM2014-07-02 05:11:25 +00:00Commented Jul 2, 2014 at 5:11
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3 Answers
This will do the trick...
if (value.substr(-1) === "?") {
// do what you need here
}
string.substr(x) will start at the character with index x and go to the end of the string. This is normally a positive number so "abcdef".substr(2) returns "cdef". If you use a negative number then it counts from the end of the string backwards. "abcdef".substr(-2) returns "ef".
string.substr(-1) just returns the last character of the string.
answered Jun 30, 2014 at 11:39
Reinstate Monica Cellio
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2 Comments
Ehsan Sajjad
can you add little explanation how
substr() will work in thid caseEhsan Sajjad
Thanks for the explanation @Archer, better put it in answer
If you want a cute endsWith function:
String.prototype.endsWith = function(pattern) {
var d = this.length - pattern.length;
return d >= 0 && this.lastIndexOf(pattern) === d;
};
console.log('Is this a question ?'.endsWith('?')); // true
Took the answer here.
Comments
You can use \?$ regex to find strings ending with ? mark.
var str = "what is your name?";
var patt = new RegExp("\? $");
if (patt.test(str))
{
// do your stuff
}
1 Comment
Wiktor Stribiżew
This code throws
Uncaught SyntaxError: Invalid regular expression: /? $/: Nothing to repeat