chenmh0901 / tscoding

tscoding

Note

Date: 2024-8-21

• Hash Map
• being used to use Set & Map in JavaScript
• Set: a collection of unique values
• Map: a collection of key-value pairs
• remember use Math liberary like Math.floor() to get the integer part of a division

Date: 2024-8-23

• 前置++和后置++的区别
• 都会改变变量的值
• nums[j]++ is the same as nums[j] = nums[j] + 1
• first return nums[j] then do nums[j]++
• ++nums[j] is the same as nums[j] = nums[j] + 1 then return nums[j]