1 files changed, 9 insertions, 0 deletions
diff --git a/pb_number b/pb_number
new file mode 100755
index 0000000..40a96be
--- /dev/null
+++ b/pb_number
@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+#--- is number functions
+# https://stackoverflow.com/questions/806906/how-do-i-test-if-a-variable-is-a-number-in-bash/806923#806923
+
+pb_isuint() { case $1        in '' | *[!0-9]*              ) return 1;; esac ;}
+pb_isint()  { case ${1#[-+]} in '' | *[!0-9]*              ) return 1;; esac ;}
+pb_isunum() { case $1        in '' | . | *[!0-9.]* | *.*.* ) return 1;; esac ;}
+pb_isnum()  { case ${1#[-+]} in '' | . | *[!0-9.]* | *.*.* ) return 1;; esac ;}