AnjaneyuluBatta505

function elementInViewport2(el) {
    var top = el.offsetTop;
    var left = el.offsetLeft;
    var width = el.offsetWidth;
    var height = el.offsetHeight;

    while(el.offsetParent) {
      el = el.offsetParent;
      top += el.offsetTop;
      left += el.offsetLeft;

AnjaneyuluBatta505

const getQueryString = params => {
  return Object.keys(params)
    .map(k => {
      if (Array.isArray(params[k])) {
        return params[k]
          .map(val => `${encodeURIComponent(k)}[]=${encodeURIComponent(val)}`)
          .join("&");
      }

      return `${encodeURIComponent(k)}=${encodeURIComponent(params[k])}`;

AnjaneyuluBatta505

import React, { Component } from "react";
import { ActivityIndicator, View } from "react-native";
import {StyleSheet} from 'react-native' 

const styles = StyleSheet.create({
    loading: {
        flex: 1,
        flexDirection: "row",
        alignItems: 'center'
    },

AnjaneyuluBatta505

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

AnjaneyuluBatta505

<!-- create_normal.html :: part 4 -->

<script type='text/javascript'>
function updateElementIndex(el, prefix, ndx) {
    var id_regex = new RegExp('(' + prefix + '-\\d+)');
    var replacement = prefix + '-' + ndx;
    if ($(el).attr("for")) $(el).attr("for", $(el).attr("for").replace(id_regex, replacement));
    if (el.id) el.id = el.id.replace(id_regex, replacement);
    if (el.name) el.name = el.name.replace(id_regex, replacement);
}

AnjaneyuluBatta505

# Uncomment the next line if you have installed wkhtmltopdf
# sudo apt remove wkhtmltopdf
cd ~
# Select an appropriate link for your system (32 or 64 bit) from the page https://wkhtmltopdf.org/downloads.html and past to the next line
wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.4/wkhtmltox-0.12.4_linux-generic-amd64.tar.xz
tar xvf wkhtmltox*.tar.xz
sudo mv wkhtmltox/bin/wkhtmlto* /usr/bin
sudo apt-get install -y openssl build-essential libssl-dev libxrender-dev git-core libx11-dev libxext-dev libfontconfig1-dev libfreetype6-dev fontconfig

AnjaneyuluBatta505

--select ARRAY(select distinct unnest(array_agg(category.arr)))
select ARRAY(select distinct unnest(array[array[1,2,3], array[4,2,8]]))

AnjaneyuluBatta505

from django.db.models.constants import LOOKUP_SEP
from django.core.exceptions import FieldDoesNotExist

# django: check if given lookup string is valid for given model

def is_valid_lookup_field(model, lookup):
    # will return first non relational field's verbose_name in lookup
    for part in lookup.split(LOOKUP_SEP):
        print(part)
        try:

AnjaneyuluBatta505

class LoginRequiredMixin(object):
    """
    View mixin which requires that the user is authenticated.
    """
    @method_decorator(login_required)
    def dispatch(self, request, *args, **kwargs):
        return super(LoginRequiredMixin, self).dispatch(
            self, request, *args, **kwargs)

AnjaneyuluBatta505

[program:myapp]
autostart = true
autorestart = true
command = python /home/pi/myapp.py
environment=SECRET_ID="secret_id",SECRET_KEY="secret_key_avoiding_%_chars"
stdout_logfile = /home/pi/stdout.log
stderr_logfile = /home/pi/stderr.log
startretries = 3
user = pi