spencerwi

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spencerwi

SELECT
    Name, DoB, (current_date - DoB) as Age
FROM
    People
WHERE
    Name = 'John Smith'
;

spencerwi

let person  = filter (\x -> name x == "John Smith") people
    age dob = getCurrentTime >>= return . (\now -> (diffDays now dob) `div` 365) . utctDay    
in
    [name person, dob person, age (dob person)]

spencerwi

// BAD:
List<PersonEntity> pes = someFetcherFunction.findByAgeGreaterThan(18);
if (pes.contains(currentPE)) { return "Hello, sir/madam."; }
else { return "This method is for adults only!"; }



// GOOD:
static Integer LEGAL_ADULTHOOD_AGE = 18; // in class PersonEntity
//...

spencerwi

List<PersonEntity> attendees = conference.getAttendees();
Collections.sort(new Comparator<PersonEntity> {
  @Override
  public int sort(PersonEntity person1, PersonEntity person2) {
    Date person1ArrivalDate = person1.getArrivalDate(),
         person2ArrivalDate = person2.getArrivalDate();
    if (person1ArrivalDate == null) person1ArrivalDate = DEFAULT_ARRIVAL_DATE;
    if (person2ArrivalDate == null) person2ArrivalDate = DEFAULT_ARRIVAL_DATE;
    int comparisonByArrivalDateResult = person1ArrivalDate.compareTo(person2ArrivalDate);
    if (comparisonByArrivalDateResult == 0) {

spencerwi

List<PersonEntity> attendees = conference.getAttendees();
Collections.sort(new Comparator<PersonEntity> {
  @Override
  public int sort(PersonEntity person1, PersonEntity person2) {
    final int BOTH_ARE_EQUAL = 0;
    int comparisonByArrivalDateResult = this.compareByArrivalDate(person1, person2);
    if (comparisonByArrivalDateResult == BOTH_ARE_EQUAL) {      
      int comparisonByTicketTierResult = this.compareByTicketTier(person1, person2);
      if (comparisonByTicketTierResult == BOTH_ARE_EQUAL) {
        return this.compareByLastName(person1, person2);

spencerwi

import Data.List
import Text.Regex
 
encloseField :: String -> String
encloseField field
    | "," `isInfixOf` field     = "\"" ++ (escapeField field) ++ "\""
    | otherwise                 = escapeField field

escapeField :: String -> String
escapeField field

spencerwi

var fs = require('fs');
var repl = require('repl');

var __ = require('underscore')._;

var files = {};
var jsonFiles = process.argv.slice(2);
jsonFiles.forEach(function(val) {
    files[val] = JSON.parse(fs.readFileSync(val));
});

spencerwi

/* Assumption: arrayOfElements is an array of DOM nodes created from a template or otherwise. */

/* Don't do this! This reflows the DOM a *lot* */
var targetNode = document.getElementById('target');

var appendToTargetNode = targetNode.appendChild.bind(targetNode);
arrayOfElements.forEach(appendToTargetNode);


/* Instead, use a DocumentFragment */

spencerwi

/* Again, the assumption: arrayOfElements is an array of DOM nodes created from a template or otherwise. */
 
/* We can set our targetNode to "display:none", change it, and then reset it, making it into a poor man's DocumentFragment */
var targetNode = document.getElementById('target');
var previousDisplayValue = targetNode.style.display;
targetNode.style.display="none"; 			/* 1 reflow */

var appendToNode = targetNode.appendChild.bind(targetNode);
arrayOfElements.forEach(appendtoTargetNode); 		/* 0 reflows */