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Top Forums UNIX for Dummies Questions & Answers Expanding variables with Ed Bash 3.2.33 Post 302339885 by de_la_espada on Friday 31st of July 2009 03:58:26 PM
Old 07-31-2009
Expanding variables with Ed Bash 3.2.33

Hi,

The following code finds the line containing fruits in test.txt and replaces instances of apple with banana.

Code:
   ed -s test.txt <<< $'/fruits/s/apple/banana/g\nw'

What I want to do is put variables in the place of fruits, apple and banana.

I have tried replacing ' with " to get the variables to expand, but to no avail.

Code:
ed -s accounts.txt <<< $"/$account/s/$balance/$newBalance/g\nw"

Also
Code:
ed -s accounts.txt <<< $"/${account}/s/${balance}/${newBalance}/g\nw"

And trying to echo them, but still no luck.


I'm using GNU bash, version 3.2.33(1)-release (i386-redhat-linux-gnu)
 

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ARRAY_REPLACE(3)							 1							  ARRAY_REPLACE(3)

array_replace - Replaces elements from passed arrays into the first array

SYNOPSIS
array array_replace (array $array1, array $array2, [array $...]) DESCRIPTION
array_replace(3) replaces the values of $array1 with values having the same keys in each of the following arrays. If a key from the first array exists in the second array, its value will be replaced by the value from the second array. If the key exists in the second array, and not the first, it will be created in the first array. If a key only exists in the first array, it will be left as is. If several arrays are passed for replacement, they will be processed in order, the later arrays overwriting the previous values. array_replace(3) is not recursive : it will replace values in the first array by whatever type is in the second array. PARAMETERS
o $array1 - The array in which elements are replaced. o $array2 - The array from which elements will be extracted. o $... - More arrays from which elements will be extracted. Values from later arrays overwrite the previous values. RETURN VALUES
Returns an array, or NULL if an error occurs. EXAMPLES
Example #1 array_replace(3) example <?php $base = array("orange", "banana", "apple", "raspberry"); $replacements = array(0 => "pineapple", 4 => "cherry"); $replacements2 = array(0 => "grape"); $basket = array_replace($base, $replacements, $replacements2); print_r($basket); ?> The above example will output: Array ( [0] => grape [1] => banana [2] => apple [3] => raspberry [4] => cherry ) SEE ALSO
array_replace_recursive(3), array_merge(3). PHP Documentation Group ARRAY_REPLACE(3)
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