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{{mirc title|$isnumber Identifier}}'''$isnumber''' Returns $true if text is a number, otherwise returns $false. | {{mirc title|$isnumber Identifier}}'''$isnumber''' Returns $true if text is a number, otherwise returns $false. | ||
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== Synopsis == | == Synopsis == | ||
<source lang="mIRC"> | <source lang="mIRC"> | ||
| − | $isnumber(text, | + | $isnumber(text [,snd],I,J)</source> |
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== Parameters == | == Parameters == | ||
| − | + | '''text''' - The input string to be checked<br /> | |
| − | + | '''csend''' - Switches which expand the types of numbers accepted, multiple switches allowed. Default accepts only integers >= 0 | |
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== Properties == | == Properties == | ||
None | None | ||
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== Example == | == Example == | ||
<source lang="mIRC">//echo -a $isnumber(564)</source> | <source lang="mIRC">//echo -a $isnumber(564)</source> | ||
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<source lang="mIRC">//echo -a $isnumber(abcdefG)</source> | <source lang="mIRC">//echo -a $isnumber(abcdefG)</source> | ||
| − | will return '''$false''' because not all the | + | will return '''$false''' because not all the character are digit |
| + | <pre>//var %a 1.23e+45 | echo -a $isnumber(%a,e) vs $isnumber(%a,ed)</pre> | ||
| + | result: $false vs $true (because presence of the decimal requires 'd' or 'c' switch) | ||
<pre>//var %a -123 | echo -a $isnumber(%a) vs $isnumber(%a,s)</pre> | <pre>//var %a -123 | echo -a $isnumber(%a) vs $isnumber(%a,s)</pre> | ||
| − | result: $false vs $true (using a sign requires 's') | + | result: $false vs $true (using a sign requires 's' or 'c') |
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| + | Note: Most users would probably want to use some/all of the 'sdn' switches if there's a risk the string can contain of unwanted false matches with some hex strings triggering a match as if they're using scientific notation, and also because it has a partial subset of unexpected utf8 codepoints matching as if numeric. The next 2 examples shows that the 'c' switch matches 170 UTF8 codepoints, while using \d with $regex's /u switch matches 370. | ||
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| + | <pre> | ||
| + | //var %i 1 , %a | while (%i isnum 1-65535) { if ((%i !isnum 55296-57343) && ($isnumber($chr(%i),c))) var %a %a %i | inc %i } | echo -ag %a : $numtok(%a,32) tokens | ||
| − | + | //var %i 1 , %a | while (%i isnum 1-65535) { if ((%i !isnum 55296-57343) && ($regex($chr(%i),/^\d$/u))) var %a %a %i | inc %i } | echo -ag %a : $numtok(%a,32) tokens</pre> | |
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| + | <pre>//var -s %a $lower($crc(LFAX,0)) | echo -a %a is $isnumber(%a,c)</pre> | ||
| + | result: 08436e69 is $true | ||
| + | Recognizes this hex string as numeric because the number following the lowercase 'e' is not large enough to prevent $calc(8436*10^69) to be larger than approx 2^1023.99. | ||
== Compatibility == | == Compatibility == | ||
{{mIRC compatibility|7.58}} | {{mIRC compatibility|7.58}} | ||
== See also == | == See also == | ||
* {{mIRC|$calc}} | * {{mIRC|$calc}} | ||
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