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setOperand(op: Operation): ?Operation {
		let newNumber: ?string;
		if (!Validator.validDigit(op.stringVal, this.queue)) {
			return null;
		}

		let lastOp: ?Operation = lastOrNull(this.queue);

		if (lastOp && (
				this.cleared ||

breeko

setOperand(op: Operation): ?Operation {
		let newNumber: ?string;
		if (!Validator.validDigit(op.stringVal, this.queue)) {
			return null;
		}

		let lastOp: ?Operation = lastOrNull(this.queue);

		if (lastOp && (
				this.cleared ||

breeko

//@flow
export const OperationType = Object.freeze({
  'Constant': 1,            // a constant value (e.g. 2, 5, pi)
  'Operation': 2,           // can be calculated based on inputs (e.g. cos, +, !)
  'Equals': 3,              // clears and evaluates the queue
  'Clear': 4,               // clears the queue
  'Parenthesis': 5,         // parenthesis
});

export const OperationSubType = Object.freeze({

breeko

//@flow

import {Operation, newOperation} from './Operations';
import {OperationType, OperationSubType, OperationArgs} from './OperationTypes';

import {zipWithIndexTwice, lastOrNull, isInArray, numberWithCommas, isNumeric} from '../utils/Utils';
import CalcUtils from '../utils/CalculatorUtils';
import Validator from '../utils/Validator';

export default class CalculatorBrain {

breeko

//@flow
import {isInArray, multiply} from '../utils/Utils';
import {OperationType, OperationSubType, OperationArgs} from './OperationTypes';

const OperationsOverloaded = Object.freeze({
  '−': Object.freeze({
    UnaryOp: 'neg',
    BinaryOp: '−'
  })
});

breeko

//@flow
import React, {Component} from 'react';
import {SafeAreaView, Text, ScrollView, StyleSheet, TouchableHighlight, Alert, Clipboard, Dimensions} from 'react-native';
import Colors from '../constants/Colors';
import Constants from '../constants/Constants'

import { isNumeric } from '../utils/Utils';

type Props = {
  topDisplay: string,

breeko

//@flow
import React, {Component} from 'react';
import {Text, StyleSheet, TouchableOpacity} from 'react-native';
import Colors from '../constants/Colors';
import Constants from '../constants/Constants'

type Props = {
  operator: string,
  handleButtonPress: (string) => any,
}

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//@flow
import React, {Component} from 'react';
import {View, StyleSheet} from 'react-native';
import CalculatorButton from './CalculatorButton';

type Props = {
  handleButtonPress: (string) => any,
  reset: () => any,
  deleteLast: () => any,
  switchButton: () => any,

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import { AppRegistry } from 'react-native';
import App from './app/App';
import { YellowBox } from 'react-native';

AppRegistry.registerComponent('OpenCalc', () => App);
YellowBox.ignoreWarnings(['Warning: isMounted(...) is deprecated', 'Module RCTImageLoader','Class RCTCxxModule']);

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//@flow
import React, {Component} from 'react';
import {StyleSheet, View, Clipboard} from 'react-native';

import CalculatorResponse from './components/CalculatorResponse';

import CalculatorBrain from './core/CalculatorBrain';

import Colors from './constants/Colors';
import Constants from './constants/Constants'