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Heap
and Stack
are both a data structure
in which data items are arranged in order, which involves data The storage method in memory, Javascript
, as a scripting language
, naturally cannot avoid the operation of heap
, stack
.
1. Stack operation
mainly uses the two methods pop() and push(). Add/delete elements from the end of the array.
<script> let arr=[]; //入栈push(),返回值为数组长度 console.log(arr.push(1,2,3)); console.log(arr); console.log(arr.push(4)); console.log(arr); //出栈pop() console.log(arr.pop()); console.log(arr); console.log(arr.pop()); console.log(arr); </script>
2. Queue operation
mainly uses unshift() These two methods, shift(), add/delete elements at the beginning of the array.
<script> arr=[]; arr.unshift("a","b","c"); console.log(arr); //入队列 arr.unshift("d"); console.log(arr); //出队列 arr.shift(); console.log(arr); arr.shift(); console.log(arr); </script>
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