From: Robert Klemme <shortcutter@...>
Date: 2011-10-18T05:10:08+09:00
Subject: Re: Ruby functions to split numbers

On Mon, Oct 17, 2011 at 7:48 PM, ideal one <idealone5@hotmail.com> wrote:
> Robert Klemme wrote in post #1026992:
>> On Fri, Oct 14, 2011 at 11:54 PM, ideal one <idealone5@hotmail.com>
>> wrote:
>>>> keep in mind that a number with a leading zero makes ruby think the base
>>>> is
>>>> octal:
>>>>
>>>> ruby-1.9.2-p290 :019 > 012
>>>> => 10
>>>>
>>>> hope that helps.
>>
>>>       How can i auto increment the number, i tried doing
>>> something like this...
>>> var1 is always constant, but i want to autoincrement var2
>>>
>>> value = var2 + 1 # iam getting Cannot convert Fixnum to String Error.
>>> is something like this works var2++, not tried this in ruby.
>>> Preserve leading Zero and also autoincrement..
>>
>> I am still not sure I get what you really want to do with those
>> numbers.  What exactly is your input (String or a Fixnum) and what do
>> you want to do with it?
>>
>> Here is one more way to split and assign to local variables:
>>
>> irb(main):009:0> s = "1234567"
>> => "1234567"
>> irb(main):010:0> /\A(?<v1>\d{1,3})(?<v2>\d{5})\z/ =~ s
>> => 0
>> irb(main):011:0> v1
>> => "12"
>> irb(main):012:0> v2
>> => "34567"
>>
>> But if your input is already numeric other approaches are usually
>> better, e.g.
>>
>> irb(main):013:0> n = 1234567
>> => 1234567
>> irb(main):014:0> v1 = n / 100000
>> => 12
>> irb(main):015:0> v2 = n % 100000
>> => 34567
>>
>> (Assuming we're talking about decimal representation.)
>>
>> Kind regards
>>
>> robert
>
> Hi All,
>
>           Sorry if I am not clear with my requirement, Let me try to
> explain in detail...
> I have to create few Accounts, so the account number i am providing to
> the system manually each time and it should be in series.
> I have to enter the 7 digit account numbers in two text box in my
> application.
> the First 3 digits goes in first text box and remaining 4 digits goes in
> the second text box, that is why i was looking for a Split function.
>
> eg:  Default or starting Account No - 1230567, so next one in series
> should be 1230568,1230569....so on. I need to increment this account
> number everytime, so that my code picks the next correct number.
> Secondly, i have to place these account numbers in two different text
> boxes.
> first 3 digits, ie 123 goes into first text box
> remaining 4 digits goes into second text box.
>
> Increment and Splitting the numbers in my code, the better way i was
> looking for....

def split_account(no)
  high, low = no.to_int.divmod 10_000
  ["%03d" % high, "%04d" % low]
end

100.times do |num|
  a, b = split_account num
  # ...
end

or

123456.upto 123470 do |num|
  a, b = split_account num
  # ...
end

Instead of "" % x you can also use sprintf - it's the same.

> Let me know if you require more information.

Where do you need the leading zeros?

Kind regards

robert


-- 
remember.guy do |as, often| as.you_can - without end
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