In this example, the date fields will only accept input that matches the pattern 'dd/mm/yyyy' (this could just as easily be changed to 'yyyy-mm-dd' or 'mm/dd/yyyy').
The time field will allow input starting with 'hh:mm' following by an optional 'am' or 'pm'. The code behind the form is as follows: For each field in the form (first the dates, then the time field), a check is made as to whether the input is blank.
Regular expressions are a very useful tool for a variety of string related tasks.
In Kettle they are frequently used for extraction and manipulation tasks, as well as for specifying groups of file names.
The Ajax Request class is a simple one we've created and use on a number of projects.
You can find the details in Web Services using XMLHttp Request (Ajax) and related articles. It doesn't allow a space after minutes and before the am/pm example: " am" will get an invalid time. I modified the reg to the following: re = /^(\d): (\d)(:00)?
On an abstract level a regular expression, regex for short, is a representation of a set of strings. Instead of having a list and thus the complete set of strings that are valid zip codes, it’s often more practical to have a short and precise regex that completely describes the set. As an example consider the set of strings that end in “.csv”.
The article contains many samples to explain each concept encountered in regular expression syntax.The code behind the form now is as follows: If you're not already familiar with regular expressions, then this might be getting a bit complicated.Basically, for each of the regular expression tests, an array is returned holding each component of the pattern that we've matched.If not, the input is compared to the regular expression.The expressions use a pre-defined class is returned which enables the form to be submitted.