Remember that as described previously this method does not mutate the original array, but it returns a new array. Or an array: const fruits = Ĭonst allfruits = ncat() You can also use the concat() method you saw before, passing a list of items separated by a comma: const fruits = Ĭonst allfruits = ncat('mango', 'melon', 'avocado') To append a multiple item to an array, you can use push() by calling it with multiple arguments: const fruits = Notice that concat() does not actually add an item to the array, but creates a new array, which you can assign to another variable, or reassign to the original array (declaring it as let, as you cannot reassign a const): const fruits = To create a new array instead, use the concat() Array method: const fruits = To append a single item to an array, use the push() method provided by the Array object: const fruits = Of course, make sure in this case that you don't use as the condition myArray (as some people over the Internet suggest based on the end that as soon as i is greater than the highest index, it will return undefined which evaluates to false). My benchmarking loops: function arrpush_small() I'd love to see the results of an IE run though. I like the arr.push() syntax better, but I think I'd be better off with the arr Version, at least in raw speed. Large arrays: No significant difference (160ms).Try it Syntax JSON.stringify(value) JSON.stringify(value, replacer) JSON. Small arrays: No significant difference (and Chrome is FAST! Only ~38ms !!) The JSON.stringify () static method converts a JavaScript value to a JSON string, optionally replacing values if a replacer function is specified or optionally including only the specified properties if a replacer array is specified.Large arrays: arr = b is faster (160ms vs.entry prompt ('Enter your name') entryArray entry.split ('') Share Improve this answer Follow answered at 11:44 James Hill 60. Small arrays: arr = b is faster (90ms vs. When specifying an empty string as the separator, the split () method will return an array with one element per character.Large arrays: arr.push(b) is faster (500ms vs.Small arrays: arr = b is faster (300ms vs.Some quick benchmarking (each test = 500k appended elements and the results are averages of multiple runs) showed the following:
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