anudeepsamaiya

Learn Go in ~5mins

This is inspired by A half-hour to learn Rust and Zig in 30 minutes.

Basics

Your first Go program as a classical "Hello World" is pretty simple:

First we create a workspace for our project:

anudeepsamaiya

Celery worker blocks on rate limited task
=========================================
by github.com/miraculixx

Problem:

    If a worker has a rate_limit active on some task, and that task
    arrives (is received)  more often than the rate limit interval, all
    worker processes will block on these task instances and stop
    consuming other tasks as soon as the prefetch count has maxed out

anudeepsamaiya

import pickle
import threading
from Queue import Queue

import time
from bson import InvalidDocument

from celery.utils.log import get_task_logger

logger = get_task_logger(__name__)

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# coding: utf-8
"""Cause git to detect a merge conflict when two branches have migrations."""
# myapp/management/commands/makemigrations.py
# you'll need myapp/management/commands/__init__.py and myapp/management/__init__.py in PY2, see Django docs
from __future__ import absolute_import, unicode_literals

import io

import os
import six

anudeepsamaiya

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

anudeepsamaiya

public static void postNewComment(Context context,final UserAccount userAccount,final String comment,final int blogId,final int postId){
    mPostCommentResponse.requestStarted();
    RequestQueue queue = Volley.newRequestQueue(context);
    StringRequest sr = new StringRequest(Request.Method.POST,"http://api.someservice.com/post/comment", new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            mPostCommentResponse.requestCompleted();
        }
    }, new Response.ErrorListener() {
        @Override

anudeepsamaiya

import android.animation.ObjectAnimator;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.widget.CheckBox;
import android.widget.ImageView;

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You can use this class to realize a simple sectioned RecyclerView.Adapter without changing your code.

The RecyclerView should use a LinearLayoutManager. You can use this code also with the TwoWayView with the ListLayoutManager (https://github.com/lucasr/twoway-view)

This is a porting of the class SimpleSectionedListAdapter provided by Google

Example:

anudeepsamaiya

<!-- You can change the parent around to whatever you normally use -->
<style name="DebugColors" parent="Theme.AppCompat">

    <!-- System colors -->
    <item name="android:windowBackground">@color/__debugWindowBackground</item>

    <item name="android:colorPressedHighlight">#FF4400</item>
    <item name="android:colorLongPressedHighlight">#FF0044</item>
    <item name="android:colorFocusedHighlight">#44FF00</item>
    <item name="android:colorActivatedHighlight">#00FF44</item>

anudeepsamaiya

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/main_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"