Detailed introduction about thick

concat() connects elements to the array join() converts all elements of the array into strings and connects them together splice() inserts, deletes, and replaces array elements push() adds elements to the end of the array pop() Remove the last element of the array shift() Remove the first element of the array unshift() Insert an element at the head of the array slice() Return a part of the array every() Test whether the assertion function is true for each array element some() ) Tests whether there is at least one array element for which the assertion function is true foreach() Specifies a function for each element of the array filter() Returns the array element that satisfies the assertion function indexOf() Finds matching elements in the array lastIndexOf() in the array Reverse search map() calculates a new array element from the elements of the array reduce() calculates a value from the elements of the array from left to right reduceRight() reduces the array from right to left and calculates a value sort() sorts the array elements in the original array reverse() reverses the order of the array elements in the original array t

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