futureperfect

futureperfect

Hey,

This is collection of small, interesting interview practice problems.

Hope you get some utility out of this.

Erik

futureperfect

Swift Exercises

This is a collection of familiarization exercises in Swift. They'll suffer from ignorance of writing idiomatic code. My goal is to iterate on these as fluency develops and leave them up for the brave.

In short:

• Caveat Lector
• Don't Be A Jerk

futureperfect

py4j.protocol.Py4JJavaError: An error occurred while calling o90.save.
: java.io.IOException: Failed to open native connection to Cassandra at {<Redacted>}:<Redacted port>
	at com.datastax.spark.connector.cql.CassandraConnector$.com$datastax$spark$connector$cql$CassandraConnector$$createSession(CassandraConnector.scala:168)
	at com.datastax.spark.connector.cql.CassandraConnector$$anonfun$8.apply(CassandraConnector.scala:154)
	at com.datastax.spark.connector.cql.CassandraConnector$$anonfun$8.apply(CassandraConnector.scala:154)
	at com.datastax.spark.connector.cql.RefCountedCache.createNewValueAndKeys(RefCountedCache.scala:32)
	at com.datastax.spark.connector.cql.RefCountedCache.syncAcquire(RefCountedCache.scala:69)
	at com.datastax.spark.connector.cql.RefCountedCache.acquire(RefCountedCache.scala:57)
	at com.datastax.spark.connector.cql.CassandraConnector.openSession(CassandraConnector.scala:79)
	at com.datastax.spark.connector.cql.CassandraConnector.withSessionDo(CassandraConnector.scala:111)

futureperfect

Alan Kay's talk at Creative Think seminar, July 20, 1982

Outline of talk: Metaphors, Magnetic Fields, Snobbery and Slogans 

The best way to predict the future is to invent it. 

Humans like fantasy and sharing: 
Fantasy fulfills a need for a simpler, more controllable world. 

Sharing is important - we're all communication junkies. We have an incredible bandwidth 

futureperfect

pico-8 cartridge // http://www.pico-8.com
version 16
__lua__
-- move an ball on-screen
-- by erik hollembeak

SCREEN_WIDTH = 128
SCREEN_HEIGHT = 128

-- Ball definition

futureperfect

/* Write a program that opens a file (with the open() system call) and then
 * calls fork() to create a new process. Can both the child and parent access
 * the file descriptor returned by open()? What happens when they are writing to
 * the file concurrently, i.e., at the same time? */

#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

futureperfect

# What methods does a class implement?
> Time.methods
=> [:!, :!=, :!~, :<, :<=, :<=>, :==, :===, :=~, :>, :>=, :__id__, :__send__, :allocate, :ancestors, :at, :autoload, :autoload?, :class, :class_eval, :class_exec, :class_variable_defined?, :class_variable_get, :class_variable_set, :class_variables, :clone, :const_defined?, :const_get, :const_missing, :const_set, :constants, :define_singleton_method, :deprecate_constant, :display, :dup, :enum_for, :eql?, :equal?, :extend, :freeze, :frozen?, :gm, :hash, :include, :include?, :included_modules, :inspect, :instance_eval, :instance_exec, :instance_method, :instance_methods, :instance_of?, :instance_variable_defined?, :instance_variable_get, :instance_variable_set, :instance_variables, :is_a?, :itself, :kind_of?, :local, :method, :method_defined?, :methods, :mktime, :module_eval, :module_exec, :name, :new, :nil?, :now, :object_id, :prepend, :private_class_method, :private_constant, :private_instance_methods, :private_method_defined?, :private_methods, :protected_

futureperfect

// https://tour.golang.org/methods/22
package main

import "golang.org/x/tour/reader"

type MyReader struct{}

func (reader MyReader) Read(b []byte) (int, error) {
	count := 0
	for i, _ := range b {

futureperfect

2.4.2