> For the complete documentation index, see [llms.txt](https://hannahpun.gitbook.io/leetcode-note/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hannahpun.gitbook.io/leetcode-note/tools/ying-wen-xiao-ci-dian.md).

# 英文小辭典

![](/files/-LsTZ6BulM-uqzaL6f6G)

### Array/String

* **Subarrays/substrings**: 一定要連續的

```javascript
 [1, 2, 3, 4] 
 // subarray 為
 [1], [1,2], [1,2,3], [1,2,3,4], [2,3,4], [3,4], [4] 等等
```

* **Subsequences**: 排序要一樣但不一定是連續

```javascript
 [1, 2, 3, 4] 
 // Subsequences 為
 [1, 3], [4], [], [2, 3], but not [3, 2], [5], [4, 1]
```

* **Subsets:** any set of elements from the original array or string. 不管排序也不需要連續

```javascript
 [1, 2, 3, 4] 
 // Subsets 為
 [3, 2], [4, 1, 2], [1]... 
 // subset 不管順序所以 [4, 1, 2] 跟 [1, 2, 4] 相同
```

### Math Symbols

* {} curly bracket
* () round bracket
* \[] square bracket
* ! Exclamation mark

### a

* ascending order 小到大 
* adjacent 相鄰

### c

* corresponding 相對應 ex. Given a date, return the corresponding day of the week for that date.
* case sensitive 區分大小寫 ex. "a" is considered a different type of stone from "A"
* contiguous / consecutively 連續的
* composite number 複合數 (4, 6, 8, 9, 12...)
* cube 三次方 , eg, 5³ (five cube), 那 n 次方為 5 to the power of *n. (5*ⁿ*)*

### d

* descending 大到小
* divide 除
* distinct 不同 
* denoted 表示, eg.  commonly denoted F(n) form a sequence
* Destructuring

```
let [a, b] = [1, 2];
[a, b] = [b, a]
// a =  2, b =1
```

### e

* even 偶數 / odd 奇數 distinct 不同 \[範例]
* encryption　加密
* Expression : 會回傳東西

```
var a = 5;
12+ 3
```

### f

* followed by 其次是，eg. call '50", followed by a space, followed by the address.  → 50 leetcode.com

### i

* integers 整數 = 正整數 + 附整數 + 零的統稱
* indices 指數，ex. 位置 \['apple', 'banana'] apple 的 indices 就是 0
* intersection 交集
* Immutable 不可改變的, eg. 原始值 Number, String...

### l

* literals

```
[1, 2, 3] // Array literals  
2 // Numeric literals
{a: 1} //Object literals
"hannah" // String literals
`Hi ${dd}`  // Template literals
```

### m

* multiplication 乘
* majority element 大多數的元素 ex. \[2, 2, 2, 1] → 2
* Mutable 可改變的, eg. obj

### n

* non-negative integers 正整數

### p

* positive integers 正整數
* palindrome 回文
* partition 分割
* Primes Number 質數 (2, 3, 5, 7, 11...)

### r

* respectively 分別
* Rest Parameters 可以把他想成取代 arguments 的語法

```
function sum(...nums) {
 console.log(nums)
}
sum(1, 2, 3, 4) // [1, 2, 3]
```

### s

* squares of its digits 數字平方， ex 9² → 81,   5²(five square)
* Spread Operator 把陣列展開成個別值

```
var params = [ "a", 1, 7 ]
var other = [ 1, 2, ...params ] // [ 1, 2, "a", 1, 7 ]
```

* Statement 不會回傳東西

```
if(){}
for(){}
while(){}
```

#### t

* Ternary indicate 三元運算式，conditional ? truethy\_block : falsey\_block
* Transpose 顛倒<br>