I keep seeing answers that say to use => or .bind(this) but neither of those solutions worked.
import React, { Component } from 'react';
import { View, Text, TextInput, StyleSheet } from 'react-native';
export default class MyWeatherApp extends Component {
constructor(props) {
super(props);
...
Designing Data structure for Firebase
------Question-------
Warning: My query would be more theoretical (sorry programmers,
please bear with me). I am trying to get some idea on how to define the
database structure for use in Firebase.
I am exploring the use of Firebase as a backend for a Review app (in Android) I am trying to build.
The...
Is it possible to access (read only) the variables captured by a lambda?
Is it possible to access (read only) the variables captured by a lambda?
This doesn't work:
std::function<double (const double)> plus (const double a) {
return [a] (const double b) -> double {
return a+b;
};
}
auto plus5 = plus(5);
cout << plus5.a << endl;
----Answers------
1....
Running nasm program on ARM linux
Question
I am trying to teach myself assembly programming with NASM. However I
only have a Chromebook with ARM processor. I have xubuntu running on it
with crunton. However how can I setup a x86 emulation environment to get
myself started? I also want to be able to use insight debugger.
Answers
1.
Try...
Android studio add different size drawable and layout folder
how can i add those folders in my project in android studio
res/drawable-ldpi/
res/drawable-ldpi-v8/
res/drawable-ldpi-v11/
res/drawable-mdpi/
res/drawable-mdpi-v8/
res/drawable-mdpi-v11/
res/drawable-hdpi/
res/drawable-hdpi-v8/
res/drawable-hdpi-v11/
res/drawable-xhdpi/
res/drawable-xhdpi-v8/
res/drawable-xhdpi-v11/
res/drawable-xxhdpi/
res/drawable-xxhdpi-v8/
res/drawable-xxhdpi-v11/
res/layout-land
res/layout-small-port-v4
res/layout-sw600dp-v13
res/layout-w480dp-v13
res/layout-v11
res/layout-port
i...
Work around for re-rendering new state in react
import React, {Component} from 'react';
import Square from './components/board.js';
const spaceArr = ()=> {
const arr =[];
for (var i=0; i<20; i++){
arr.push(Math.floor(Math.random()*(400-0)));
}
return arr;
};
class...
Resolving Promises Asynchronously in angularjs
My code:
$q(function (resolve) {
var imageUploadResults = [];
fileUploadService.uploadImage($scope.filesUpload, "/api/mailbox/uploadAttachFile", function (result) {
console.log(result);
imageUploadResults.push(result.LocalFilePath);
});
$scope.mail.Files = imageUploadResults;
...
Resize problem in scroll area
Hello everyone, here is my code:
myplot *p = new myplot(gao.structpayloadgraph,
gao1.structpayloadgraph,
gao.structcol-2, "payload");
ui->scrollArea->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
ui->scrollArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
ui->scrollArea->setWidgetResizable(false);
p->resize(ui->scrollArea->size().width(),...
Angular2 Filter issue
Here's how I am using the filter:
<ion-item *ngFor="let contact of contacts | isMember">
<ion-label>{{contact.name}}</ion-label>
{{contact.phoneNumber}}-{{contact.isMember}}
</ion-item>
Filter definition below:
import { Pipe, PipeTransform...
How get ownership property of (Method: TRttiMethod) in TVirtualInterface TVirtualInterfaceInvokeEvent?
how i get ownership property of Method: TRttiMethod in OnInvoke method of TVirtualInterface class?
I have this interface:
IPerson = interface(IInvokable)
['{45CE428C-F880-4D61-A2C1-0F3CB47130B5}']
procedure SetName(const Value: string);
function GetName(): string;
[TEntityField('Field...
GroupBy after orderBy for complicated query in Laravel
Here is my code for fetching messaging and grouping them for each chat
$query = DB::table('chats');
$otherUserId= $request->input('loadId');
if($otherUserId==0){
$query->join('users as u1', 'u1.id', '=', 'chats.user1_id');
$query->join('users as u2', 'u2.id', '=', 'chats.user2_id');
...
Firebase run script after retrieving existing data
I have a function in js that needs to refresh after I retrieve data from Firebase.
firebase.database().ref('/users/' + this.userId + '/info')
.on('child_added', function(snapshot){
this.myFunction();
}.bind(this));
The problem...
Would relatively primitive people really confuse technology with magic?
Questions:
It's common for people to say that if a time traveler or an alien displayed advanced technology to ancient or medieval people, that they'd assume it was magic, and either worship him as a god or burn him as a witch.
But if aliens visited the Earth tomorrow and had technology hundreds of...
A small group recreating modern technology
Questions:
Suppose a group of people get transported back in time (say 2500 years). Then, in a manner reminiscent of A Connecticut Yankee in King Arthur's Court, they try to re-design modern technology. Assume that there's no shortage of labor or materials; the only real lack is knowledge.
What...