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1:48 am, October 2, 2025

check if a variable is undefined or NULL

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id: 283931
uid: y4wXB
insdate: 2025-10-02 01:48:16
title: check if a variable is undefined or NULL
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linked_class: code
linked_uid: SYTk7
views: 14
week_num: 40
month_num: 10
year_num: 25

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