--description--
You can use the same principles from the previous two lessons to destructure values from nested objects.
Using an object similar to previous examples:
const user = {
johnDoe: {
age: 34,
email: 'johnDoe@freeCodeCamp.com'
}
};
Here's how to extract the values of object properties and assign them to variables with the same name:
const { johnDoe: { age, email }} = user;
And here's how you can assign an object properties' values to variables with different names:
const { johnDoe: { age: userAge, email: userEmail }} = user;
--instructions--
Replace the two assignments with an equivalent destructuring assignment. It should still assign the variables lowToday
and highToday
the values of today.low
and today.high
from the LOCAL_FORECAST
object.
--hints--
You should remove the ES5 assignment syntax.
assert(
!__helpers.removeJSComments(code).match(/lowToday = LOCAL_FORECAST\.today\.low/g) &&
!__helpers.removeJSComments(code).match(/highToday = LOCAL_FORECAST\.today.high/g)
);
You should use destructuring to create the lowToday
variable.
assert(
__helpers.removeJSComments(code).match(
/(var|const|let)\s*{\s*today\s*:\s*{\s*(low\s*:\s*lowToday[^}]*|[^,]*,\s*low\s*:\s*lowToday\s*)},?\s*}\s*=\s*LOCAL_FORECAST(;|\s+|\/\/)/g
)
);
You should use destructuring to create the highToday
variable.
assert(
__helpers.removeJSComments(code).match(
/(var|const|let)\s*{\s*today\s*:\s*{\s*(high\s*:\s*highToday[^}]*|[^,]*,\s*high\s*:\s*highToday,?\s*)},?\s*}\s*=\s*LOCAL_FORECAST(;|\s+|\/\/)/g
)
);
lowToday
should be equal to 64
and highToday
should be equal to 77
.
assert(lowToday === 64 && highToday === 77);
--seed--
--seed-contents--
const LOCAL_FORECAST = {
yesterday: { low: 61, high: 75 },
today: { low: 64, high: 77 },
tomorrow: { low: 68, high: 80 }
};
// Only change code below this line
const lowToday = LOCAL_FORECAST.today.low;
const highToday = LOCAL_FORECAST.today.high;
// Only change code above this line
--solutions--
const LOCAL_FORECAST = {
yesterday: { low: 61, high: 75 },
today: { low: 64, high: 77 },
tomorrow: { low: 68, high: 80 }
};
const { today: { low: lowToday, high: highToday }} = LOCAL_FORECAST;