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Diffstat (limited to 'awklib/eg/lib/isnumeric.awk')
| -rw-r--r-- | awklib/eg/lib/isnumeric.awk | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/awklib/eg/lib/isnumeric.awk b/awklib/eg/lib/isnumeric.awk new file mode 100644 index 00000000..c2699022 --- /dev/null +++ b/awklib/eg/lib/isnumeric.awk @@ -0,0 +1,19 @@ +# isnumeric --- check whether a value is numeric + +function isnumeric(x, f) +{ + switch (typeof(x)) { + case "strnum": + case "number": + return 1 + case "string": + return (split(x, f, " ") == 1) && (typeof(f[1]) == "strnum") + default: + return 0 + } +} + +Please note that leading or trailing white space is disregarded in deciding +whether a value is numeric or not, so if it matters to you, you may want +to add an additional check for that. + |