javaScript: can someone explain this

开发者_运维知识库What does this mean?

var settings = {
    "column-1" : ["block-1"], 
    "column-2" : ["block-2"]
};

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It means one should [likely] read a tutorial/book on JavaScript before asking questions like this on SO ;-) (Explaining what "it means" will likely have not much "practical meaning" by itself.)

Like Eloquent JavaScript: A Modern Introduction to Programming

I believe the exact construct/term that is being sought is "object literals" -- {...} is for objects and [...] is for arrays.

Happy coding.

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This will create a new object and store it in the settings variable.

The object is created by an Object literal and consist out of two propertys (column-1 and column-2) which are both assigned an Array with a single String value.

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It defines an object containing two properties (column-1 and column-2) which both contain arrays which both contain a single value (block-1 an block-2).

Due to the - in the property name it will be impossible to access them using the object.property syntax so you'll have to use the array syntax: object['property']

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Initialized a variable named settings and assigned the value {"column-1": ["block"], "column-2": ["block-2"]}, which is an object, to the settings.