build regular expression

[aashishn86]

hiii!!
i don't really have much idea about regular expressions...
i need to make one which can input
all alphabets and
only "/"

thanks....

[Dormilich]

you're looking for something like that?

[gits]

yes ... have a look at the suggested link to get started with regExp and then you might have a look at the following example and understand how it works :)

[CODE=javascript]var s = 'aAA/a';
alert(/^[a-z/]+$/gi.test(s));[/CODE]
kind regards

[aashishn86]

can you explain the example plz...

[Dormilich]

have a look at the reference.

gits' RegEx tests, if the complete string consists of at least 1 character which can be an alphabetical letter (excluding special letters) or slash. case-sensitivity is off (that's what the "i" after the RexExp stands for) and all matches are saved ("g")

[gits]

have you had a look at the link the dormilich showed you? ... let me give you a short summary for the regExp in the example (i'll do it with comments in the code):

[CODE=javascript]// here we create a new regular expression with the
// literals (the slashes) -> /pattern/ ... this is equivalent
// with new RegExp(pattern, options)
var re = /^[a-z/]+$/ig;

// ^ - forces to match from the beginning
// [] - initiates a character-class (list of characters to match)
// a-z - says that it should match all lower case alphabets
// / - we want to match the slash additionally
// + - says we want to match the pattern for any character to test
// $ - forces to match from the end

// option i - after the slash tells to ignore case
// option g - matches global (could be left out here)[/CODE]
there are several things that could be done another way to achieve the same result ... as you see we could leave out the g-option or the i-option when we would add A-Z to the character-list etc.

kind regards

[gits]

same time posting ;) ...