comparison replace_text_in_line.xml @ 7:d64eace4f9f3 draft

Uploaded

6:8928e6d1e7ba

        <requirement type="package" version="4.2.2-sandbox">gnu_sed</requirement>
    </expand>
    <version_command>sed --version | head -n 1</version_command>
    <command>
<![CDATA[
        sed 
            -r
            --sandbox
            "s/$find_pattern/$replace_pattern/g"
            "$infile"
        > "$outfile"
]]>
    </command>
    <inputs>
        <param format="txt" name="infile" type="data" label="File to process" />
         <param name="find_pattern" type="text" size="20" label="Find pattern" help="Use simple text, or a valid regular expression (without backslashes // ) " > 
            <sanitizer>
                <valid initial="string.printable">
                    <remove value="&apos;"/>
                </valid>
            </sanitizer>

-----

**Example 2**

**Find Pattern:** ^(.{4}) 
**Replace Pattern:** &\\t

Find the first four characters in each line, and replace them with the same text, followed by a tab character. In practice - this will split the first line into two columns.


-----

**Extened Regular Expression Syntax**

The select tool searches the data for lines containing or not containing a match to the given pattern. A Regular Expression is a pattern descibing a certain amount of text. 

- **( ) { } [ ] . * ? + \ ^ $** are all special characters. **\\** can be used to "escape" a special character, allowing that special character to be searched for.
- **^** matches the beginning of a string(but not an internal line).
- **(** .. **)** groups a particular pattern.
- **{** n or n, or n,m **}** specifies an expected number of repetitions of the preceding pattern.

  - **{n}** The preceding item is matched exactly n times.
  - **{n,}** The preceding item ismatched n or more times. 
  - **{n,m}** The preceding item is matched at least n times but not more than m times. 

- **[** ... **]** creates a character class. Within the brackets, single characters can be placed. A dash (-) may be used to indicate a range such as **a-z**.
- **.** Matches any single character except a newline.
- ***** The preceding item will be matched zero or more times.
- **?** The preceding item is optional and matched at most once.
- **+** The preceding item will be matched one or more times.
- **^** has two meaning:
  - matches the beginning of a line or string. 
  - indicates negation in a character class. For example, [^...] matches every character except the ones inside brackets.
- **$** matches the end of a line or string.
- **\|** Separates alternate possibilities. 


**Note**: SED uses extended regular expression syntax, not Perl syntax. **\\d**, **\\w**, **\\s** etc. are **not** supported.

@REFERENCES@

7:d64eace4f9f3

        <requirement type="package" version="4.2.2-sandbox">gnu_sed</requirement>
    </expand>
    <version_command>sed --version | head -n 1</version_command>
    <command>
<![CDATA[
        sed
            -r
            --sandbox
            "s/$find_pattern/$replace_pattern/g"
            "$infile"
        > "$outfile"
]]>
    </command>
    <inputs>
        <param format="txt" name="infile" type="data" label="File to process" />
         <param name="find_pattern" type="text" size="20" label="Find pattern" help="Use simple text, or a valid regular expression (without backslashes // ) " >
            <sanitizer>
                <valid initial="string.printable">
                    <remove value="&apos;"/>
                </valid>
            </sanitizer>

-----

**Example 2**

**Find Pattern:** ^(.{4})
**Replace Pattern:** &\\t

Find the first four characters in each line, and replace them with the same text, followed by a tab character. In practice - this will split the first line into two columns.


-----

**Extened Regular Expression Syntax**

The select tool searches the data for lines containing or not containing a match to the given pattern. A Regular Expression is a pattern descibing a certain amount of text.

- **( ) { } [ ] . * ? + \ ^ $** are all special characters. **\\** can be used to "escape" a special character, allowing that special character to be searched for.
- **^** matches the beginning of a string(but not an internal line).
- **(** .. **)** groups a particular pattern.
- **{** n or n, or n,m **}** specifies an expected number of repetitions of the preceding pattern.

  - **{n}** The preceding item is matched exactly n times.
  - **{n,}** The preceding item ismatched n or more times.
  - **{n,m}** The preceding item is matched at least n times but not more than m times.

- **[** ... **]** creates a character class. Within the brackets, single characters can be placed. A dash (-) may be used to indicate a range such as **a-z**.
- **.** Matches any single character except a newline.
- ***** The preceding item will be matched zero or more times.
- **?** The preceding item is optional and matched at most once.
- **+** The preceding item will be matched one or more times.
- **^** has two meaning:
  - matches the beginning of a line or string.
  - indicates negation in a character class. For example, [^...] matches every character except the ones inside brackets.
- **$** matches the end of a line or string.
- **\|** Separates alternate possibilities.


**Note**: SED uses extended regular expression syntax, not Perl syntax. **\\d**, **\\w**, **\\s** etc. are **not** supported.

@REFERENCES@