๐ฉ reduce( ) method in JavaScript
A Thread๐งต
A Thread๐งต
๐ Let's learn this topic through the "for" loop example.
โช Suppose, we want to add all elements of the array using for loop.
โช So, we can achieve this goal using the following method ๐
โช Suppose, we want to add all elements of the array using for loop.
โช So, we can achieve this goal using the following method ๐
๐ก Above snippet:
โช The "total" is a global variable that is used to ๐๐๐ผ๐ฟ๐ฒ/๐ฎ๐ฐ๐ฐ๐๐บ๐๐น๐ฎ๐๐ฒ/๐ฐ๐ผ๐น๐น๐ฒ๐ฐ๐ the resultant values after adding all items to the array.
โช The "total" is a global variable that is used to ๐๐๐ผ๐ฟ๐ฒ/๐ฎ๐ฐ๐ฐ๐๐บ๐๐น๐ฎ๐๐ฒ/๐ฐ๐ผ๐น๐น๐ฒ๐ฐ๐ the resultant values after adding all items to the array.
โช And it ๐ถ๐ป๐ถ๐๐ถ๐ฎ๐น๐ฉ๐ฎ๐น๐๐ฒ is 0, and in each iteration, we added an array item to the accumulator variable that is "total"
๐ But we can achieve this goal using the reduce( ) method in JavaScript.
๐ But we can achieve this goal using the reduce( ) method in JavaScript.
๐ญ reduce( )
โช The reduce() method executes a reducer/shorter function on each element of the array.
โช It returns a single value as a result and doesn't execute the function for an empty array element.
โช The reduce() method executes a reducer/shorter function on each element of the array.
โช It returns a single value as a result and doesn't execute the function for an empty array element.
๐ญ Syntax:
โช total: It's an result of the previous function call, equal to the "InitialValue" the first time if provided.
โช item: This is an individual(current) element of the array.
โช total: It's an result of the previous function call, equal to the "InitialValue" the first time if provided.
โช item: This is an individual(current) element of the array.
โช index: It's a current index of the current element of the array.
โช InitialValue: Starting value that is used to initialize the first time the callback function is called.
๐ก (Now compare the 1st example above with this syntax)
โช InitialValue: Starting value that is used to initialize the first time the callback function is called.
๐ก (Now compare the 1st example above with this syntax)
๐ก Example 1:
1st Iteration:
๐ถ๐ป๐ถ๐๐ถ๐ฎ๐น๐ฉ๐ฎ๐น๐๐ฒ = 0
total = 0
item = 10
2nd Iteration:
total = 10
item = 20
3rd Iteration:
total = 30
item = -30 , and so on...
โช The resultant values will be stored in the "totalINR" variable.
1st Iteration:
๐ถ๐ป๐ถ๐๐ถ๐ฎ๐น๐ฉ๐ฎ๐น๐๐ฒ = 0
total = 0
item = 10
2nd Iteration:
total = 10
item = 20
3rd Iteration:
total = 30
item = -30 , and so on...
โช The resultant values will be stored in the "totalINR" variable.
๐ก Example 2:
โ Find the highest amount from the array.
โช The resultant values will be stored in the "highAmount" variable.
โช Here, the initial value is equal to the first element of the array which is 1025.
2nd iteration:
collect = 1025
item = 2640, and so on...
โ Find the highest amount from the array.
โช The resultant values will be stored in the "highAmount" variable.
โช Here, the initial value is equal to the first element of the array which is 1025.
2nd iteration:
collect = 1025
item = 2640, and so on...
That's all for now, we will meet in the next thread๐
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For:
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โจ JavaScript
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๐ Follow Me @ATechAjay
For:
๐ Web Development
โจ JavaScript
๐ Writing Skill
๐ฅ Motivation
๐น Growth
โ But Not For Only Resources & Shitpost ๐
Thank you so much for staying to the end of this thread๐
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