gladchinda

console.log(+'100'); // 100

console.log(+null); // 0
console.log(+void 0); // NaN

console.log(+true); // 1
console.log(+false); // 0

console.log(+[]); // 0
console.log(+[100]); // 100

gladchinda

console.log(100 + ''); // "100"

console.log(null + ''); // "null"
console.log(void 0 + ''); // "undefined"

console.log(true + ''); // "true"
console.log(false + ''); // "false"

console.log([] + ''); // ""
console.log([100] + ''); // "100"

gladchinda

// METHOD 1: Using if/else statements
if (loggedIn) {
  showUserProfile();
} else {
  showLoginForm();
}

// METHOD 2: Using ternary operation
loggedIn ? showUserProfile() : showLoginForm();

gladchinda

var MIN_VALUE = 1;
var MAX_VALUE = 5;

/**
 * boundedValue(val)
 *
 * Returns val if val between MIN_VALUE and MAX_VALUE both inclusive
 *
 * Otherwise, returns MIN_VALUE if val is less than MIN_VALUE
 *

gladchinda

function randomInteger(maxvalue) {
  return 1 + Math.floor(Math.random() * maxvalue);
}

gladchinda

var MIN_VALUE = 1;
var MAX_VALUE = 5;

/**
 * boundedValue(val)
 *
 * Returns val if val between MIN_VALUE and MAX_VALUE both inclusive
 *
 * Otherwise, returns MIN_VALUE if val is less than MIN_VALUE
 *

gladchinda

function leftZeroPad(value, maxlength) {
  while (value.length < maxlength) {
    value = '0' + value;
  }
  return value;
}

function boundedValue(minvalue, maxvalue) {
  return function(value) {
    return Math.max(minvalue, Math.min(maxvalue, +value || 0));

gladchinda

$('#button').on('click', function(evt) {
  evt.preventDefault();
  var content = $('<h1>Random Post Title</h1><p>Random post text.</p>');
  
  $('#element').append(content);
});

gladchinda

class MyComponent extends React.Component {

  constructor(props) {
    super(props);
    this.toggleInputCase = this.toggleInputCase.bind(this);
    this.state = { uppercase: false };
  }
  
  toggleInputCase() {
    const isUpper = this.state.uppercase;

gladchinda

class MyComponent extends React.Component {

  constructor(props) {
    super(props);
    this.toggleInputCase = this.toggleInputCase.bind(this);
    this.state = { uppercase: false };
  }
  
  toggleInputCase() {
    const isUpper = this.state.uppercase;