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Coding, software engineering & #bitcoin technologies. I'll make you a better thinker, not just a better developer | Ex Amazon, Senior DevOps @eBay
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频道帖子
Know what version of Python you're using. There are differences. For instance, when dealing with strings:
Python 3: bytes contains sequences of 8-bit values, str -> seqs of Unicode chars
Python 2: str contains sequences of 8-bit values, unicode -> seqs Unicode chars
| 2 | AWS Storage Services
- S3: general
- Glacier: archiving & backup
- EBS: block storage (disks)
- Storage Gateway: connect on-premise with storage in AWS infrastructure | 148 |
| 3 | R was created in 1993 at the University of Auckland in New Zealand by Robert Gentleman and Ross Ihaka
R is mostly used for data data analysis.
In of January 2020, R ranked the 18th most popular programming language | 149 |
| 4 | Design patterns in 1 tweet
Flyweight: support a large number objects efficiently by sharing constant parts of their state (called intrinsic state)
Ex: To represent a text document, a Flyweight object is created per character in the character set. | 123 |
| 5 | In Linux, directories have permissions too
- You can list their contents if it's *readable*
- You can access a file in a directory if the directory is *executable*
To change permissions, use chmod
- chmod 711 file
- chmod u+x file (users can execute the file) | 116 |
| 6 | If the code and the comments disagree,
they are both probably wrong | 103 |
| 7 | The best code is the one you don't have to write. | 93 |
| 8 | If it's worth doing just once, it is worth automating! | 99 |
| 9 | 2 Quick Interview tips
- Think out loud while solving the problem. Explain your thought process.
- If your interviewer jumps in to help you, don't freak out. It's normal. | 98 |
| 10 | In MATLAB, for a nxn array A, what does A(:) do?
It creates a n^2x1 column vector. Column, not row, because MATLAB matrices are column-major | 91 |
| 11 | "If you don't fail at least 90 percent of the time, you're not aiming high enough."
- Alan Kay | 84 |
| 12 | Big O is not the only factor to consider when you think about algorithm performance. Also:
- Disk usage
- Memory
- Cache
- Network
- Concurrency (and its overhead)
- ... | 85 |
| 13 | There's no test like production | 77 |
| 14 | Inside every complex program is a simple program trying to get out | 78 |
| 15 | Cloud Deployment Manager is Google's Infrastructure as Code service, similar to Terraform.
It automates repeatable tasks like provisioning, configuration, and deployments for any number of machines. | 80 |
| 16 | Working software is the primary measure of progress
agilemanifesto .org | 73 |
| 17 | It's easier to write an incorrect program than understand a correct one | 74 |
| 18 | 4 Common linked list interview questions
1. Reverse linked list, recursive & iterative
2. Merge two sorted linked list
3. Does a linked list have a cycle?
4. Find the intersection of two lists
5. Add numbers represented by two lists
Try to solve them (easily googable) | 72 |
| 19 | "The real money isn't in the software.
It's in the service you build with that software."
- Jeff Atwood | 69 |
| 20 | Becoming a coder needs focus and discipline
- Get a bit better every day
- Focus on one thing: frontend, backend, android, ios, ...
There are too many technologies.
Know a bit about everything, but become a specialist so that you can fing the type of job you want | 71 |
