On 11Oct2020 22:08, None <[email protected]> wrote:
>On Sunday, October 11, 2020 3:54 PM, Cameron Simpson <[email protected]> wrote:
>> On 11Oct2020 18:54, None [email protected] wrote:
>> > The play 15 different sets of numbers and to check if they won any prize a
>> > script using a chain of if statements or case statements would be correct
>> > to implement this. AWK may also do the job?
>> > There are six numbers that we need to check let us suppose that we had the
>> > numbers in a file numbers.dat and it has the fifteen combinations
>> > 2 - 3 - 5 - 7 - 11 - 13
>> > ...
>> > ...
>> > 15 versions
>> > Check against the winning numbers
>> > 2 - 7 - 23 - 38 - 51 - 53
>> > Faster way to check compare string? Compare numbers one by one and check
>> > for at least 3
>>
>> This feels somewhat like homework, so I'll provide suggests instead of
>> complete code. Besides, you probably want to write it yourself.
[... shell script based suggestions ...]
>
>Thank you for your help. This is not a homework problem.
Fair enough.
>It is a time saving thing, we can check online input the numbers one by one,
>but there are 15 sets. It takes time. Having a bash script can do the job,
>but question is do we get the winning numbers as integers, or do we compare
>them as strings?
1: You don't need bash. Write for the Bourne shell - almost none of
bash's extensions are of much value for programming, and _every_ system
has a Bourne shell (/bin/sh) - "bash" is just a dialect.
2: The shell is good at strings (for basic stuff, which this is). Work
in strings. Your text file is strings. You're only testing for equality
- you don't need arithmetic, strings are fine. Think of the numbers as
symbols instead of numeric values.
>If we compare numbers (num1 == $num1)
>Or [ ] I have problems with the scripts working correctly and getting '('
>expected.
The case statement lets you sidestep that kind of syntactic thing. Hence the
examples.
>I will try to write the script and ask for help if I run into problems.
Sounds good to me.
>I have seen pages where there are references with awk, seq and other commands
>https://www.unix.com/shell-programming-and-scripting/276553-lottery-number-checker.html
>https://www.txlottery.org/export/sites/lottery/Games/Check_Your_Numbers.html
>
>I wanted to use grep command by piping the cat command, but I have dilemma
>that if an array is used, the code is cleaner and more efficient.
Gah. Use strings!
All these solutions seem overly complex to me. My personal mantra is:
use the smallest tool which succintly expresses the solution.
In this case, you can do it _all_ in the shell without reaching for more
general tools.
Cheers,
Cameron Simpson <[email protected]>
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