# CMU 15-112 - 200525

###### tags: `Tutor` `CS`

## Learning Intention

Using the summer time to get an idea of Big Data ^^

## Homework
- Decide which program would you wanna enroll
- Program Homework2 sheet

### Coursera's Programs

Based on our intention and mom's suggestions, we would like to enroll a CS program for school's credits and help our career.

#### Options

- [Google IT Automation with Python Professional Certificate](https://www.coursera.org/professional-certificates/google-it-automation#courses)
- [IBM Data Science Professional Certificate](https://www.coursera.org/professional-certificates/ibm-data-science)
- [Applied Data Science with Python Specialization](https://www.coursera.org/specializations/data-science-python)

> By the way, it's okay for you to search for other cou

### Homework 2

- Write 'split()' function
- Implement strStr()

#### Split() function

Write a function which does the same thing as 'split()'.

Take HW problem 3's 2 sentences as an example.

#### Implement strStr()

Implement strStr().

Write as a function.

Return the index of the first occurrence of 'needle' in 'haystack', or -1 if needle is not part of haystack.

>
>Example 1:
>
>Input: haystack = "hello", >needle = "ll"
>Output: 2
>
>
>Example 2:
>
>Input: haystack = "aaaaa", >needle = "bba"
>Output: -1
>
***Question:***

1.
Input: haystack = "heaven"
neddle ="ea"

2.
Input: haystack = "sunny"
needle = "ny"

***Discuss:***

What should we return when needle is an empty string?