An old trick Hashing taking advantage of tjr inherent sparsity in Big Data to reduce 90% time without loss of > 1% accuracy in data.
For examples : in picture recognition, many data are blanks consists of background (scenario, lighting), only less than 10% are striking pattern data which characterise the particular objects, like zebra trait, tiger body skin lines, elephant trunk, sunflower… when search data are stored in a matrix of billion columns and rows, 90% elements are 0.
Web application with front-end browser and its back-end database is called Full-Stack programming.
Three mysterious Math Objects:
- Complex Numbers,
- Prime Numbers
are hiding in circle.
After the defeat in all 3 matches, Ke Jie said “AlphaGo is approaching God!”.
This version of AlphaGo is 10x more powerful than last year’s version which has beateb the South-korean Go player Lee.
Google makes Kotlin a first-class language for writing Android apps
Why Kotlin ?https://www.programiz.com/sites/tutorial2program/files/kotlin.jpg
Get Started: https://developer.android.com/kotlin/get-started.html
Download Android Studio using Kotlin (2 ways)
- Android Studio 3.0 Beta (Buggy Preview, not encouraged!)
- Stable Android Studio (2.3.2), manually add Kotlin plug-in (Preferred way)
Functional Programming with Kotlin: ( Map, filter, apply, lazy sequence, reactive programming…)
Development IDE: “Android Studio”
- It is a version of “Intelligent IDEA”
- Bundled with Build Tool “Gradle”
1. 先快速浏览：Basic Syntax – Kotlin Programming Language
2. 对于Java选手，附加看这个：From Java to Kotlin
3. 上手跟着这个tutorial一步一步完成它的练习：Try Kotlin (Koan)
4. 把 Cheatsheet 打出来贴在显示器旁边没事看看：https://pbs.twimg.com/media/C0yRbHLUUAAgacl.jpg
5. 文字版本 Cheatsheet： https://gist.github.com/dodyg/5823184 https://gist.github.com/dodyg/5616605
知乎: Kotlin 之旅 (it.xxx, sequence, filter, map …)