Janak-Nirmal

Get started

npx create-expo-app --template

Heavy full on installation

Janak-Nirmal

/**
 * Filters an array of objects using custom predicates.
 *
 * @param  {Array}  array: the array to filter
 * @param  {Object} filters: an object with the filter criteria
 * @return {Array}
 */
function filterArray(array, filters) {
  const filterKeys = Object.keys(filters);
  return array.filter(item => {

Janak-Nirmal

Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "your_email@youremail.com"

Janak-Nirmal

import React, {Component} from "react";
import {Animated, Dimensions, Platform, Text, TouchableOpacity, View} from "react-native";
import {Body, Header, List, ListItem as Item, ScrollableTab, Tab, TabHeading, Tabs, Title} from "native-base";
import LinearGradient from "react-native-linear-gradient";

const {width: SCREEN_WIDTH} = Dimensions.get("window");
const IMAGE_HEIGHT = 250;
const HEADER_HEIGHT = Platform.OS === "ios" ? 64 : 50;
const SCROLL_HEIGHT = IMAGE_HEIGHT - HEADER_HEIGHT;
const THEME_COLOR = "rgba(85,186,255, 1)";

Janak-Nirmal

Note: This post is a summary of information paraphrased from an excellent blog post by Christian Sepulveda.

Prerequisites

• Create-React-App
• Yarn

Instructions

Create the app and download the necessary dependencies.

Janak-Nirmal

MKMapRect zoomRect = MKMapRectNull;
for (id <MKAnnotation> annotation in mapView.annotations) {
    MKMapPoint annotationPoint = MKMapPointForCoordinate(annotation.coordinate);
    MKMapRect pointRect = MKMapRectMake(annotationPoint.x, annotationPoint.y, 0, 0);
    if (MKMapRectIsNull(zoomRect)) {
        zoomRect = pointRect;
    } else {
        zoomRect = MKMapRectUnion(zoomRect, pointRect);
    }
}

Janak-Nirmal

//
//  NSAttributedString+RZExtensions.h
//  Raizlabs
//
//  Created by Alex Rouse on 12/13/13.

// Copyright 2014 Raizlabs and other contributors
// http://raizlabs.com/
// 
// Permission is hereby granted, free of charge, to any person obtaining

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// See http://mindsea.com/2012/12/18/downscaling-huge-alassets-without-fear-of-sigkill for details

#import <AssetsLibrary/AssetsLibrary.h>
#import <ImageIO/ImageIO.h>

// Helper methods for thumbnailForAsset:maxPixelSize:
static size_t getAssetBytesCallback(void *info, void *buffer, off_t position, size_t count) {
    ALAssetRepresentation *rep = (__bridge id)info;
    
    NSError *error = nil;

Janak-Nirmal

#!/usr/bin/env bash

uninstall() {
  list=`gem list --no-versions`
  for gem in $list; do
    gem uninstall $gem -aIx
  done
  gem list
  gem install bundler
}

Janak-Nirmal

List of Block Declaration Syntaxes

Throughout, let

• return_type be the type of object/primitive/etc. you'd like to return (commonly void)
• blockName be the variable name of the block you're creating
• var_type be the type object/primitive/etc. you'd like to pass as an argument (leave blank for no parameters)
• varName be the variable name of the given parameter And remember that you can create as many parameters as you'd like.

Blocks as Variables

Possibly the most common for of declaration.