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Shell Programming and Scripting
Need help with Unix assignmet
Post 302138214 by barbus on Sunday 30th of September 2007 11:00:52 AM
09-30-2007
Need help with Unix assignmet
Hi i am a newbie to UNIX and i am undertaking a course, i have some exercises and one of them is as follows:
Create a file with x amount of lines in it, the content of your choice.
Write a script named 'firstline' that takes two arguments. The first being a line of text, the second being your newly created file. The script should take the first argument and insert it into the very top (the first line) of the file named in your second argument.
Assume the file is called “textfile1” and has the contents
Text one
Text two
Text three
.
.
.
.
Text n
How do i redirect a variable that hold text (or a string of characters) to the 1st line of the file, without effect the current 1st line.
The variable doesn’t need any input from the user, so it assume it will be as follows:
Mytext=”hello people” this being the 1st argument $1
Not I am NOT permitted to use either SED or AWK.
i am not looking for the full answer please, just a hint on how to start this, i am trying to learn after all
Any help will be greatly appreciated.
Create a file with x amount of lines in it, the content of your choice.
Write a script named 'firstline' that takes two arguments. The first being a line of text, the second being your newly created file. The script should take the first argument and insert it into the very top (the first line) of the file named in your second argument.
Assume the file is called “textfile1” and has the contents
Text one
Text two
Text three
.
.
.
.
Text n
How do i redirect a variable that hold text (or a string of characters) to the 1st line of the file, without effect the current 1st line.
The variable doesn’t need any input from the user, so it assume it will be as follows:
Mytext=”hello people” this being the 1st argument $1
Not I am NOT permitted to use either SED or AWK.
i am not looking for the full answer please, just a hint on how to start this, i am trying to learn after all
Any help will be greatly appreciated.
Last edited by barbus; 09-30-2007 at 12:13 PM..
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xml::dom::text
XML::DOM::Text(3) User Contributed Perl Documentation XML::DOM::Text(3) NAME
XML::DOM::Text - A piece of XML text in XML::DOM DESCRIPTION
XML::DOM::Text extends XML::DOM::CharacterData, which extends XML::DOM::Node. The Text interface represents the textual content (termed character data in XML) of an Element or Attr. If there is no markup inside an element's content, the text is contained in a single object implementing the Text interface that is the only child of the element. If there is markup, it is parsed into a list of elements and Text nodes that form the list of children of the element. When a document is first made available via the DOM, there is only one Text node for each block of text. Users may create adjacent Text nodes that represent the contents of a given element without any intervening markup, but should be aware that there is no way to represent the separations between these nodes in XML or HTML, so they will not (in general) persist between DOM editing sessions. The normalize() method on Element merges any such adjacent Text objects into a single node for each block of text; this is recommended before employing operations that depend on a particular document structure, such as navigation with XPointers. METHODS splitText (offset) Breaks this Text node into two Text nodes at the specified offset, keeping both in the tree as siblings. This node then only contains all the content up to the offset point. And a new Text node, which is inserted as the next sibling of this node, contains all the content at and after the offset point. Parameters: offset The offset at which to split, starting from 0. Return Value: The new Text node. DOMExceptions: o INDEX_SIZE_ERR Raised if the specified offset is negative or greater than the number of characters in data. o NO_MODIFICATION_ALLOWED_ERR Raised if this node is readonly. perl v5.12.1 2000-01-31 XML::DOM::Text(3)