O Off by one (Php web hosting) errors (Pitfall) Warnings:
O Off by one errors (Pitfall) Warnings: . Beware when you prefix decimal values with a zero character. You may want to justify a column of figures. If you add leading zero characters to a numeric string, if that string is subsequently parsed back to a numeric value, you may inadvertently export the value as a decimal but import it as an octal value. This can lead to an extremely difficult-to-diagnose fault in your software because the parsers sometimes add some intelligence and will correctly interpret the value as decimal if the characters 8 or 9 are present, but otherwise interpret it as octal notation. . This may be implementation-dependant behavior to some extent. . Be careful that you remove any leading zero characters from the text strings that you plan to convert using the numeric parser. The example shows a simple function for doing this. Example code:
See also: Decimal value, Hexadecimal value, Integer constant, Number, Number.toString() Cross-references: ECMA 262 edition 3 section B.1 O’Reilly JavaScript Definitive Guide page 35 Off by one errors (Pitfall) An error caused by missing the target value by one. This kind of errors are caused by the following: . Forgetting than an index is zero-based and assuming it begins at 1. This typically affects arrays and strings. . Enumerating through a range of values and testing for equality with the target value rather than testing that you are still less than the target value. This is typically a problem when you build for loops. See also: Array index delimiter ([ ]), Array.slice(), do … while( … ), for( … ) …, Pitfalls, while( … ) … 1605