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JavaScript - access property case-insensitively
1 answers
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How can I specify an object's property by name regardless of case?
Let's say I have an object:
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var myObject = { id: 1, name: 'Ann' };I need to access a property of that object dynamically, for example:
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function setter(object, property, value) {2
object[property] = value;3
}Now, I want the property to be case insensitive in case the property name is passed into the function as e.g. ID instead of id.
1 answer
0 points
Use toLowerCase() or toUpperCase() method to convert both strings to the same case and then compare them.
Practical example
In this example, we create a reusable function that converts property argument to lower case and compare it with given object property names also converted to lower case.
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var hasOwnProperty = Object.prototype.hasOwnProperty;2
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function setProperty(object, key, value) {4
var tmp = key.toLowerCase();5
for (var item in object) {6
if (hasOwnProperty.call(object, item) && tmp === item.toLowerCase()) {7
object[item] = value;8
return;9
}10
}11
}12
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// Usage example:15
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var myObject = { id: 1, name: 'Ann' };17
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setProperty(myObject, 'ID', 2);19
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console.log(JSON.stringify(myObject)); // { id: 2, name: 'Ann' }Warning:
This solution assums, that the object doesn't contain multiple properties with the same keys in different cases (e.g.
var myObject = { id: 1, ID: 2 }).
See also
References
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