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Top Forums Shell Programming and Scripting Remove carriage return from the variable Post 302878404 by Meacham12 on Friday 6th of December 2013 02:36:13 AM
Old 12-06-2013
Remove carriage return from the variable

Hi,

I try to handle very large numbers with a bash script. I run ssh command in a remote server and store the output in a local variable. But this output contains a return carriage at the end. So I try to remove it by tr But I can't figure out the right notation with printf. So my problem is:

Code:
 
var1=$( some command )

echo $var1
2.80985e+09
 
var2=`expr $var1 + 10000000`
expr: non-integer argument

printf "%f\n" $var1
2809850000.000000

printf "%s\n" $var1
2.80985e+09

If I use tr -dc '[:digit:]' with this printf output, it will remove all non character not only return carriage at the end.

So for first notation it will give me a number like 2809850000000000 and for second 28098509 and both incorrect. I need a display like 2809850000 so tr could only remove return carriage. So which parameter of printf would produce this notation? (w/o exponential nor decimal notation)

Thanks

Last edited by Meacham12; 12-06-2013 at 04:23 AM..
 

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VAR_EXPORT(3)								 1							     VAR_EXPORT(3)

var_export - Outputs or returns a parsable string representation of a variable

SYNOPSIS
mixed var_export (mixed $expression, [bool $return = false]) DESCRIPTION
var_export(3) gets structured information about the given variable. It is similar to var_dump(3) with one exception: the returned represen- tation is valid PHP code. PARAMETERS
o $expression - The variable you want to export. o $return - If used and set to TRUE, var_export(3) will return the variable representation instead of outputting it. RETURN VALUES
Returns the variable representation when the $return parameter is used and evaluates to TRUE. Otherwise, this function will return NULL. NOTES
Note When the $return parameter is used, this function uses internal output buffering so it cannot be used inside an ob_start(3) callback function. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.1.0 | | | | | | | Possibility to export classes and arrays con- | | | taining classes using the __set_state() magic | | | method. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 var_export(3) Examples <?php $a = array (1, 2, array ("a", "b", "c")); var_export($a); ?> The above example will output: array ( 0 => 1, 1 => 2, 2 => array ( 0 => 'a', 1 => 'b', 2 => 'c', ), ) <?php $b = 3.1; $v = var_export($b, true); echo $v; ?> The above example will output: 3.1 Example #2 Exporting classes since PHP 5.1.0 <?php class A { public $var; } $a = new A; $a->var = 5; var_export($a); ?> The above example will output: A::__set_state(array( 'var' => 5, )) Example #3 Using __set_state() (since PHP 5.1.0) <?php class A { public $var1; public $var2; public static function __set_state($an_array) { $obj = new A; $obj->var1 = $an_array['var1']; $obj->var2 = $an_array['var2']; return $obj; } } $a = new A; $a->var1 = 5; $a->var2 = 'foo'; eval('$b = ' . var_export($a, true) . ';'); // $b = A::__set_state(array( // 'var1' => 5, // 'var2' => 'foo', // )); var_dump($b); ?> The above example will output: object(A)#2 (2) { ["var1"]=> int(5) ["var2"]=> string(3) "foo" } NOTES
Note Variables of type resource couldn't be exported by this function. Note var_export(3) does not handle circular references as it would be close to impossible to generate parsable PHP code for that. If you want to do something with the full representation of an array or object, use serialize(3). Warning When var_export(3) exports objects, the leading backslash is not included in the class name of namespaced classes for maximum com- patibility. SEE ALSO
print_r(3), serialize(3), var_dump(3). PHP Documentation Group VAR_EXPORT(3)
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