--- id: 587d7b89367417b2b2512b4a title: Use Destructuring Assignment to Assign Variables from Nested Objects challengeType: 1 forumTopicId: 301214 dashedName: use-destructuring-assignment-to-assign-variables-from-nested-objects --- # --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: ```js 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: ```js const { johnDoe: { age, email }} = user; ``` And here's how you can assign an object properties' values to variables with different names: ```js 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. ```js assert( !code.match(/lowToday = LOCAL_FORECAST\.today\.low/g) && !code.match(/highToday = LOCAL_FORECAST\.today.high/g) ); ``` You should use destructuring to create the `lowToday` variable. ```js assert( 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. ```js assert( 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`. ```js assert(lowToday === 64 && highToday === 77); ``` # --seed-- ## --seed-contents-- ```js 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-- ```js 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; ```