How to make If The input contains letters and not containing numbers do something

[idkdk]

How to make If The input contains letters and not containing numbers do something please help...

[BioHazard]

By using pattern-matching with the various character-classes (which are outlined here):

https://www.fhug.org.uk/wiki/wiki/doku.php?id=plugins:understanding_lua_patterns

Here are the fundamental character-classes relevant to your query:

%a - This character-class represents all letters A-Z and a-z.
%A - This character-class represents the inverse (ie. all NON-letters).

%d - This character-class represents all digits 0-9.
%D - This character-class represents the inverse (ie. all NON-digits).

+ - This repetition-operator matches the preceding character-class one or more times.
* - This repetition-operator matches the preceding character-class zero or more times.

So, by employing the native Lua string.match() function, you can restrict an action by checking to ensure NO numbers are being returned from the Input Box. Like this:

sReturn = Input.GetText("Input1");
if not(sReturn:match("%d")) then [I][COLOR=#008000] -- check to ensure that NO digits are being returned, then
    -- do something here[/COLOR][/I]
    Dialog.Message("Notice", "Input1 does NOT contain any digits.");
end

Or, likewise you could restrict the action by checking whether any NON-letter characters are being returned. Like this:

sReturn = Input.GetText("Input1");
if not (sReturn:match("%A")) then  [I][COLOR=#008000]-- check to ensure that ONLY letters are being returned, then
    -- do something here[/COLOR][/I]
    Dialog.Message("Notice", "Input1 contains ONLY letters.");
end

There are various iterations with which you can manipulate the end-result by tweaking the control-structure and character classes. But the basic premise is the same.

[BioHazard]

EDIT,
And just an addendum to this issue. Depending on exactly what you want to exclude/include from the result, tweaks will be needed. For example, in the 2nd code sample above, you'd probably want to code in a check for 'blank strings', too. Play around with the various iterations available to you by studying the character-classes listed at the URL linked to above. You'll see that there are many variations producing slightly different results. Your final solution will be dependent on how precise you want the end result to be. (ie. Whether to include the restriction of control-characters, whether to include/exclude punctuation-characters, etc...)

[BioHazard]

And,
I'll just throw out this one other 'slightly simpler' method for restricting an action if a number is detected in the Input Box.

Note: This uses the native Lua str:find() function which should NOT be confused for the AMS function of String.Find().The latter uses Title-case, whereas the native Lua function uses lower-case. You must use lower-case for this.

[I][COLOR=#008000]-- [B]NOTE:[/B] In this example, the string.find() function uses lower-case (ie. str:find)
-- This is a native LUA function (not AMS specific).
-- So, if you change it to the AMS version using Title-case (ie. String.Find(), it will fail.[/COLOR][/I]

sReturn = Input.GetText("Input1");
nReturn = sReturn:find('[%d]') [COLOR=#008000][I]-- Look for a number in the return-string to report its position[/I][/COLOR]
if not nReturn then [I][COLOR=#008000]-- If NO number can be found, then permit an action ...
    -- do something here[/COLOR][/I]
    Dialog.Message("Notice", "No numbers detected");
end

[Ulrich]

Or, simply use a mask on the Input...

Ulrich

[ItzMagdy]

By using pattern-matching with the various character-classes (which are outlined here):

https://www.fhug.org.uk/wiki/wiki/doku.php?id=plugins:understanding_lua_patterns

Here are the fundamental character-classes relevant to your query:

%a - This character-class represents all letters A-Z and a-z.
%A - This character-class represents the inverse (ie. all NON-letters).

%d - This character-class represents all digits 0-9.
%D - This character-class represents the inverse (ie. all NON-digits).

+ - This repetition-operator matches the preceding character-class one or more times.
* - This repetition-operator matches the preceding character-class zero or more times.

So, by employing the native Lua string.match() function, you can restrict an action by checking to ensure NO numbers are being returned from the Input Box. Like this:

sReturn = Input.GetText("Input1");
if not(sReturn:match("%d")) then [I][COLOR=#008000] -- check to ensure that NO digits are being returned, then
-- do something here[/COLOR][/I]
Dialog.Message("Notice", "Input1 does NOT contain any digits.");
end

Or, likewise you could restrict the action by checking whether any NON-letter characters are being returned. Like this:

sReturn = Input.GetText("Input1");
if not (sReturn:match("%A")) then [I][COLOR=#008000]-- check to ensure that ONLY letters are being returned, then
-- do something here[/COLOR][/I]
Dialog.Message("Notice", "Input1 contains ONLY letters.");
end

There are various iterations with which you can manipulate the end-result by tweaking the control-structure and character classes. But the basic premise is the same.

This is my other acc, Thanks so much that helped me ^^
but please if you know how to cancel the next script , i will be happy
Ex.

sReturn = Input.GetText("Input3");
nReturn = sReturn:find('[%d]') -- Look for a number in the return-string to report its position
if not nReturn then -- If NO number can be found, then permit an action ...
    Dialog.Message("Attention!", "You can't convert LETTERS, just Numbers", MB_OK, MB_ICONSTOP, MB_DEFBUTTON3);
end

a = Input.GetText("Input3");
x = a * 17.9063

Label.SetText("Label8", String.Mid(x, 1, 5).. " EGP")

I mean to cancel that script

a = Input.GetText("Input3");
x = a * 17.9063

Label.SetText("Label8", String.Mid(x, 1, 5).. " EGP")

[BioHazard]

Or, simply use a mask on the Input...

Ulrich

Hi Ulrich,

Ever present, lurking in the background, I see? Is nice to hear from you. Always enjoy seeing you jump into an AMS-specific thread (but wish we heard from you more often in this neck of the woods, these days).

LOL, yes. I do have a tendency to look straight past the obvious at times, don't I? I guess though, by looking into native Lua functions, the newcomers do have an opportunity to expand their knowledge a little bit. So, hopefully it's not all for naught.
...............

...please if you know how to cancel the next script , i will be happy ...

I mean to cancel that script

a = Input.GetText("Input3");
x = a * 17.9063

Label.SetText("Label8", String.Mid(x, 1, 5).. " EGP")

@ItzMagdy,
I don't understand your question. You'll have to elaborate.

[ItzMagdy]

Hi Ulrich,

Ever present, lurking in the background, I see? Is nice to hear from you. Always enjoy seeing you jump into an AMS-specific thread (but wish we heard from you more often in this neck of the woods, these days).

LOL, yes. I do have a tendency to look straight past the obvious at times, don't I? I guess though, by looking into native Lua functions, the newcomers do have an opportunity to expand their knowledge a little bit. So, hopefully it's not all for naught.
...............




@ItzMagdy,
I don't understand your question. You'll have to elaborate.

I mean when the script can't find numbers , it shows a message, then it shows the error, i don't want it to show the error (That generated from the software (ams) cuz there's no numbers so the action will be messed up)

[BioHazard]

So, you mean something like this, then?

sReturn = Input.GetText("Input1");
nReturn = sReturn:find('[%a]');[I][COLOR=#008000]  -- Look for any letters in the return-string[/COLOR][/I]
if nReturn then [I][COLOR=#008000] -- If letter found at any position in return-string, then advise ...[/COLOR][/I]
    Dialog.Message("Attention!", "You can't convert LETTERS, just Numbers", MB_OK, MB_ICONSTOP, MB_DEFBUTTON3);
else
    if sReturn == "" then  [I][COLOR=#008000]-- Check to ensure that Input Box has not been left empty[/COLOR][/I]
        Dialog.Message("Attention!", "Input can NOT be left blank.");
    else  [I][COLOR=#008000]-- Otherwise permit the action[/COLOR][/I]
        sOutput = sReturn * 17.9063;
        Label.SetText("Label1", String.Mid(sOutput, 1, 5).. " EGP");
    end
end