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Now we can add some functionality into our script.

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So open our script and you'll see that in the case section for options Desch order a fix.

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We just wrote a first album and now we didn't start any information.

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A fixed parameter of a specified.

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So we need to change it.

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So assigned to variable FX Vol. 1 which represents that parameter fix was used by user.

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And of course if user didn't specify if experimentor the value of variable freak's should be different.

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So at the beginning just after use each function assign value 0 to variable fix and we can write command.

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So if frigs a variable is 0 do not perform for X and if it is a one perform fix.

10
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So now Vennochi know if fixed barometer was selected.

11
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And we can ask if a variable fix is equal to 1.

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That means if a user wants to perform fix.

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And also we can ask if some file was specified otherwise we would have no file for fixing space and

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tub's issues which would be Rebeck And if those conditions are true we can write to users fixing spaces

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at the beginning and at the end of lines.

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And now we use the knowledge from set lectures and fix space issue right now for a provided file.

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So we are using set with parameter I Ridgeville change provided file and we will do substitution.

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So if we find a space or stops at the end of file and those spaces and tabs can be represented by character

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class blank which matches space or type and this space or up can be at the end of file numerals time.

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So we need to use plus to by dollar sign representing end of line and those spaces and tabs at the end

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of line literally are replaced by nothing.

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So that basically means we will remove them and we also need to specify input file where changes will

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be done.

24
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So now we have fixed spaces at the end of line.

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And now we need to fix that.

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Also at the beginning.

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So match start of line followed by any space or up represented by character class blank and doe space

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or DAPs character can be present numerous time.

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And this if found will be replaced by nothing.

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We will just remove it and we will remove it from file represented by variable file and now when spaces

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issues are fixed we can print to users message.

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Dan

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so what we have done for OK's user specified file name and specified also fixed parameter we have fixed

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spaces and tabs at the beginning and at the end of each lines and by fixing space stop.

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If you mean that door spaces and tabs that are removed.

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So let's say that.

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But first create some testing file

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so I've put some text into this file.

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First line second line third line

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blah blah

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something here

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also something here

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very good

44
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and I love that line.

45
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And also some interesting Glenn

46
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and we can make some spaces and that's at the beginning or at the end of some lines

47
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and now we can say you defile.

48
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So let's test our script.

49
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If I specify only file

50
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I get no output as if we didn't right.

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Any logic for that option.

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But even he added fixed barometer we see message fixing spaces and that's dumb heavy really fix space

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issues.

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Let's open our test file to see and we see that there is no space for that.

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At the beginning or at the end of each line is this fixed barometer works perfectly.

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So in next lecture we can work on the feature how to display space and DAPs issues like that background.