is_numeric

[Helmut Schneider]

Hi,

I want to check if a variable is numeric. The manpage says is_numeric
is deprectaed and I shall user validate_legacy. But

<% if validate_legacy(Numeric, 'validate_numeric', $subsetting) { -%>

Error: Could not retrieve catalog from remote server: Error 500 on
SERVER: Server Error: Evaluation Error: Error while evaluating a
Function Call, validate_legacy(validate_numeric) expects a Numeric
value, got String at
/etc/puppetlabs/code/modules/bacula/templates/etc/bacula/bacula-dir.conf
.epp:25:7 on node bsdhelmut1164

What is the proper way to check if something is numeric?

Thank you!

[Ben Ford]

First off, you should use data types with your class and then you won't have to check--the compile won't even succeed unless you've got the right data type.

class foo (

    Integer $subsetting,

) {

    # $subsetting is guaranteed to be numeric here

    ....

}

Second, you can use the is_a function, or the ~= equality matcher.

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[Sebastian Hempel]

Hi,

> What is the proper way to check if something is numeric?

Starting with Puppet 4 you can define parameters of classes and defines
with a data type.

class myclass(
Integer $subsetting
)

IMHO this is the prefered way to "check" the type of a variable. You can
also specify the range of the allowed values [1].

[1]
https://puppet.com/docs/puppet/5.5/lang_data_number.html#the-integer-data-type
--
-- *Sebastian Hempel*
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