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I want to find out whether a variable is an array or not
if (params.writtenLines == ???)
Much appreciated.
923
The Array. isArray() method checks whether the passed variable is array or not. If the variable is an array it displays true else displays false.
You can use the Array. isArray method to check if a value is an array in TypeScript. Copied! The method takes a value as a parameter and returns a boolean result - true if the value is an array and false otherwise.
To check if an array contains an element or not in Python, use the in operator. The in operator checks whether a specified element is an integral element of a sequence like string, array, list, tuple, etc.
An array is a variable containing multiple values. Any variable may be used as an array. There is no maximum limit to the size of an array, nor any requirement that member variables be indexed or assigned contiguously.
More importantly, why do you want to check whether it's an array? If you know the parameter might be a single string or a list, you can now use:
def lines = params.list("writtenLines")
That came with Grails 1.2.
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