Complete-Javascript

What is JavaScript?

• JAVASCRIPT IS A HIGH-LEVEL PROTOTYPE-BASED OBJECT-ORIENTED MULTI-PARADIGM INTERPRETED OR JUST-IN-TIME COMPILED DYNAMIC SINGLE-THREADED GARBAGE-COLLECTED PROGRAMMING LANGUAGE WITH FIRST-CLASS FUNCTIONS AND A NON-BLOCKING EVENT LOOP CONCURRENCY MODEL. 🙂🙂🙂

Which array method to use? "I want..:"

To mutate original array	A new array
Add to original: .push (end) .unshift (start)	Computed from original: .map(loop)
Remove from original: .pop (end) .shift(start) .splice(any)Others: .reverse .sort .fill	Filtered using condition: .filter, Portion of original: .slice Adding original to other .concat, Flattening the original: .flat, .flatMap

An Array index	An array element
Based on value: .indexOf Based on test condition: .findIndex	Based on test condition: .find

Know if array includes	A new String
Based on value: .includes Based on test condition:.some, .every	Based on separator string: .join

To transform to value	To just loop array
Based on accumulator: .reduce (Boil down array to single value of any type: number, string, boolean, or even new array or object)	Based on callback .forEach(Does not create a new array, just loops over it)