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@jmoz
jmoz / rsi.py
Created September 27, 2019 07:41
RSI calculation to match Tradingview
import pandas as pd
def rsi(ohlc: pd.DataFrame, period: int = 14) -> pd.Series:
"""See source https://github.com/peerchemist/finta
and fix https://www.tradingview.com/wiki/Talk:Relative_Strength_Index_(RSI)
Relative Strength Index (RSI) is a momentum oscillator that measures the speed and change of price movements.
RSI oscillates between zero and 100. Traditionally, and according to Wilder, RSI is considered overbought when above 70 and oversold when below 30.
Signals can also be generated by looking for divergences, failure swings and centerline crossovers.
@edvinasbartkus
edvinasbartkus / .github-workflows-main.yml
Created November 16, 2019 10:06
Github Action for React Native Detox
name: Detox
on: [push]
jobs:
build:
runs-on: macOS-latest
timeout-minutes: 15
env:
@robertjpayne
robertjpayne / RCTSwiftBridgeModule.h
Last active January 17, 2024 11:43
React Native - Swift Native Modules
#import <Foundation/Foundation.h>
#import "RCTBridgeModule.h"
#define RCT_EXTERN_MODULE(objc_name, objc_supername) \
RCT_EXTERN_REMAP_MODULE(objc_name, objc_name, objc_supername)
#define RCT_EXTERN_REMAP_MODULE(js_name, objc_name, objc_supername) \
objc_name : objc_supername \
@end \
@interface objc_name (RCTExternModule) <RCTBridgeModule> \
@edvinasbartkus
edvinasbartkus / android.yml
Created November 20, 2019 14:45
Running Detox tests for Android on Github Actions Workflow
name: Android
on: [push]
jobs:
build:
runs-on: macos-latest
steps:
- name: Checkout
@mkjiau
mkjiau / axios-interceptors-refresh-token.js
Last active March 13, 2024 10:59
Axios interceptors for token refreshing and more than 2 async requests available
let isRefreshing = false;
let refreshSubscribers = [];
const instance = axios.create({
baseURL: Config.API_URL,
});
instance.interceptors.response.use(response => {
return response;
}, error => {
@dodyg
dodyg / gist:5823184
Last active March 29, 2024 03:59
Kotlin Programming Language Cheat Sheet Part 1

#Intro

Kotlin is a new programming language for the JVM. It produces Java bytecode, supports Android and generates JavaScript. The latest version of the language is Kotlin M5.3

Kotlin project website is at kotlin.jetbrains.org.

All the codes here can be copied and run on Kotlin online editor.

Let's get started.

@mrousavy
mrousavy / MEMOIZE.md
Last active April 22, 2024 19:26
Memoize!!! 💾 - a react (native) performance guide
In computing, memoization or memoisation
is an optimization technique used primarily
to speed up computer programs by storing
the results of expensive function calls and  
returning the cached result when the same
inputs occur again.                                         
                                                     — wikipedia
@twokul
twokul / hidden-classes-in-js-and-inline-caching.md
Last active April 23, 2024 22:02
Hidden classes in JavaScript and Inline Caching

Hidden classes in JavaScript and Inline Caching

Knowing how internals work is always a good. Pretty much for everything. Cars, trains, computers, you name it. It gives you an insight on what happens under the hood. You also act/react differently based on this knowledge.

As you might have guessed, it’s also true for web development. Knowledge of CSS transitions allows you to achieve better performance and not to use JavaScript in most cases. Knowledge of V8 internals allows you to write more performant JavaScript code. So let’s talk about V8 a little.

A little about V8

V8 is a JavaScript engine built by Google. Firefox built SpiderMonkey, Opera built Carakan and Microsoft built Chakra. One very important difference between V8 and other JavaScript engines is that V8 doesn’t generate any intermediate code. It compiles JavaScr

@alexhawkins
alexhawkins / nativeJavaScript.js
Last active April 28, 2024 08:52
Implementation of Native JavaScript Methods (forEach, Map, Filter, Reduce, Every, Some)
'use strict';
/*****************NATIVE forEACH*********************/
Array.prototype.myEach = function(callback) {
for (var i = 0; i < this.length; i++)
callback(this[i], i, this);
};
//tests