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@olayemii
Last active April 15, 2020 20:23
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A simple helper function for getting deeply nested object property
const getObjectProperty = (obj, path, defaultValue="", returnUndefined=true) => {
const checkForDefaultValue = value =>
value !== undefined ? value : undefined;
if (path === undefined) {
return obj;
}
try {
const value = path.split('.').reduce((o, i) => o[i], obj);
if (value === undefined && returnUndefined) return value;
return value !== undefined ? value : checkForDefaultValue(defaultValue);
} catch (e) {
if (e instanceof TypeError) return checkForDefaultValue(defaultValue);
throw e;
}
};
/*
const a = {
b: {
c: [
{
d: {
e: 14
}
},
[16, 11]
],
d: 12
}
};
getObjectProperty(a, 'b.d', "Default!");
// 12
getObjectProperty(a, 'b.e', "Not a property");
// undefined
getObjectProperty(a, 'b.e', "Not a property", false);
// Not a property
getObjectProperty(a, 'b.c.0.d.e', "Not a property!");
// 14
getObjectProperty(a, 'b.c.1.0', "Not a property!");
//16
*/
@olayemii
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Very well, for my use case the later function works. Maybe you should provide a flag.

@ahkohd okay, I added a flag to allow undefined returns or fall back to a set default value, I also included your example. 👌🏾

@ahkohd
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ahkohd commented Apr 15, 2020

Great!

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