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03-31-2008
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how to achicve translate in unix
hi,
i have file with 4 columns, the first column contains 10 numbers. i want to replace t the numbers (u can say i want to use cryptography). i want to replace 1 with 4, 2 with 5, 3 with 9..... how can i achieve this in unix.  
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03-31-2008
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When the replacement is made on the whole record, you can use the tr command.
In your case, the replacement must be made just in one field. A possible way to do the work is to use an awk program like that : Code:
#!/usr/bin/awk -f
BEGIN {
CnvFrom = "0123456789";
CnvTo = "4590382617";
Field = 1;
}
{
newField = ""
for (i=1; i<=length($Field); i++) {
char = substr($Field, i, 1);
if (pos=index(CnvFrom, char))
char = substr(CnvTo, pos, 1)
newField = newField char
}
$Field = newField
print
}
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