CODEWITHSUNDEEP
htmlstringbashformatting
Atomiklan
Atomiklan

Reputation: 5454

Bash string formatting

Any idea how a can take a string like:

string=1,2,3,4,5

and using

number=4

put 

<font color='red'><b></b></font>

around the corresponding number so the final product is:

newstring=1,2,3,<font color='red'><b>4</b></font>,5

Thanks for the help

Upvotes: 2

Views: 267

Answers (3)

clt60
clt60

Reputation: 63962

Pure bash?

string="1,2,3,4,5"
num=4

re="(^|.+,)($num)(,.+|$)"
if [[ "$string" =~ $re ]]
then
    echo -n "${BASH_REMATCH[1]}"
    echo -n "<font>${BASH_REMATCH[2]}</font>"
    echo    "${BASH_REMATCH[3]}"
else
    echo "$num doesn't match"
fi

will produce:

1,2,3,<font>4</font>,5

or perl:

echo '1,2,3,4,5' | num=4 perl -F, -lapE '$_=join ",",map{/\b$ENV{num}\b/? "<font>$_</font>":$_}@F'

Upvotes: 0

user80168
user80168

Reputation: 

echo "$string" | sed "s#\(,\|^\)\($number\)\(,\|\$\)#\\1<font color='red'><b>\\2</b></font>\\3#g"

Should work good enough in most cases.

Upvotes: 0

Konrad Rudolph
Konrad Rudolph

Reputation: 545923

You can use sed:

result="$(sed "s|\($number\)|<font color='red'><b>\1</b></font>|" <<< "$string")"

The general form is: sed s|search pattern|replace| where | is some unique delimiter (normally you’d use / but that is already used in your string for other purposes). \(…\) is a capture group which captures the hit – in this case 4 and which can be used in the replace string via \1.

Upvotes: 1

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