04-25-2011
Replace character in certain position in a string
Hello everyone this is my first post of many to come
I am writing a script and in this script at one point i need to replace a character in a particular position in a string for example:
in the string "mystery" i would need to replace the 3rd position to an "r" so the string becomes "myrtery"
i cant use cut because the loop needs to update the string on several occations on different positions so for example next time over i need to replace the 4th position to "y" the string becomes "mirytery"
any ideas as to how I can do this?? any help is greatly appreciated
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi All,
I would like to use sed to add "-" between the following string:
Value: 20060830
Result: 2006-08-30
Pls advice. Thx a lot
Victor (5 Replies)
Discussion started by: victorlung
5 Replies
2. Shell Programming and Scripting
Hi All,
My requisite is to search for the string "0108"(which is the year and has come in the wrong year format) in a particular column say 4th column in a tab delimited file and then replace it with 2008(the correct year format) in the same position where 0108 was found..The issue is the last... (15 Replies)
Discussion started by: ganesh_248
15 Replies
3. UNIX for Dummies Questions & Answers
Hi All,
My requisite is to search for the string "0108"(which is the year and has come in the wrong year format) in a particular column say 4th column in a tab delimited file and then replace it with 2008(the correct year format) in the same position where 0108 was found in the same file..The... (27 Replies)
Discussion started by: ganesh_248
27 Replies
4. UNIX for Dummies Questions & Answers
I need to replace the character on 6th position. If this character is 1 I have to repleace it with A, if it is 2 than I have to replace it with B. If it is not 1 or 2 I should not repleace it.
input:
abcd defg
abcd 1efg
mnop weac
rstu 2bcd
i need:
abcd defg
abcd Aefg
mnop weac
rstu... (2 Replies)
Discussion started by: necroman08
2 Replies
5. UNIX for Dummies Questions & Answers
Hi
I am looking for a particular string in a file.If the string exists, then I want to replace another string with some other text.Once replaced, search for the same text after that character position in the file. :wall:
E.g: Actual File content:
Hello
Name: Nitin Raj
Welcome to Unix... (4 Replies)
Discussion started by: dashing201
4 Replies
6. Shell Programming and Scripting
here is what i want to achieve... consider a file contains below contents. the file size is large about 60mb
cat dump.sql
INSERT INTO `table1` (`id`, `action`, `date`, `descrip`, `lastModified`) VALUES (1,'Change','2011-05-05 00:00:00','Account Updated','2012-02-10... (10 Replies)
Discussion started by: vivek d r
10 Replies
7. Shell Programming and Scripting
Suppose there are two files:
A, format is like:
line1 12
line2 33
line3 6
...
B, format is like:
>header
taaccctaaccctaaccctaacccaaccccaccccaaccccaaccccaac
ccaaccctaaccctaaccctaacccaaccctaaccctaaccctaacccaa
ccctcaccctcaccctcaccctcaccctcaccctcaccctcaccctaacc... (1 Reply)
Discussion started by: bioinflix
1 Replies
8. Emergency UNIX and Linux Support
I want to replace 150th character of all the lines in a file using sed or awk...
searched the forums but didn't find exact answer (9 Replies)
Discussion started by: greenworld123
9 Replies
9. Shell Programming and Scripting
Hi,
i want find the character '-' in a file from position 284-298, if it occurs i need to replace it with 'O ' for the position in the file. How to do that using SED command.
thanks in advance,
Sara (9 Replies)
Discussion started by: Sara183
9 Replies
10. Shell Programming and Scripting
Hi,
I have a file with multiple lines(fixed width dat file). I want to search for '02' in the positions 45-46 and if available, in that lines, I need to replace value in position 359 with blank. As I am new to unix, I am not able to figure out how to do this. Can you please help me to achieve... (9 Replies)
Discussion started by: Pradhikshan
9 Replies
LEARN ABOUT PHP
mb_strpos
MB_STRPOS(3) 1 MB_STRPOS(3)
mb_strpos - Find position of first occurrence of string in a string
SYNOPSIS
int mb_strpos (string $haystack, string $needle, [int $offset], [string $encoding = mb_internal_encoding()])
DESCRIPTION
Finds position of the first occurrence of a string in a string.
Performs a multi-byte safe strpos(3) operation based on number of characters. The first character's position is 0, the second character
position is 1, and so on.
PARAMETERS
o $haystack
- The string being checked.
o $needle
- The string to find in $haystack. In contrast with strpos(3), numeric values are not applied as the ordinal value of a character.
o $offset
- The search offset. If it is not specified, 0 is used.
o $encoding
-The $encoding parameter is the character encoding. If it is omitted, the internal character encoding value will be used.
RETURN VALUES
Returns the numeric position of the first occurrence of $needle in the $haystack string. If $needle is not found, it returns FALSE.
SEE ALSO
mb_internal_encoding(3), strpos(3).
PHP Documentation Group MB_STRPOS(3)