var az = { // az namespace wrap : { // _wrap(el) // pimp(el) singleton input_int : { // applyTo(el) }, display : { // applyTo(el) } }, algorithms : { } }; ( function (){ this._wrap = function ( el ) { this.el = el; this.id = el.id; this.wrapper = document.createElement("span"); this.el.parentNode.insertBefore( this.wrapper , el ); this.wrapper.appendChild( this.el ); this.content = {}; }; this.pimp = function ( el ) { var interval; var variation; var animIntensity = 1 ; function animSymbol() { variation = ( Math.random() - ( animIntensity / 100 - 0.5 ) ) * 5; animIntensity += variation ; el.style.textShadow = "0px 0px " + animIntensity + "px #28df28, 2px 2px 0px #000000, -2px -2px 0px #000000, 2px -2px 0px #000000, -2px 2px 0px #000000"; } interval = setInterval( animSymbol , 3 ); } }).apply( az.wrap ); ( function (){ function build_input_int( obj ) { obj.enable = function () { _enable( true , obj ); }; obj.disable = function () { _enable( false , obj ); }; obj.value = function () { return parseInt( obj.content.input.value ); }; obj.wrapper.className = "az_display"; // Composition: input , clearButton obj.content.input = document.createElement("input"); obj.content.input.className = "az_input"; obj.content.input.type = "number" ; obj.content.input.min = "0" ; obj.content.input.step = "1"; obj.wrapper.appendChild( obj.content.input ); obj.content.clearButton = document.createElement("button"); obj.content.clearButton.className = "az_input_clearButton"; obj.content.clearButton.innerHTML = "❌"; obj.wrapper.appendChild( obj.content.clearButton ); obj.content.clearButton.addEventListener( "click" , function (){ obj.content.input.value = NaN; _updateClearButton( obj ); ev_onValue( obj ); }); obj.content.input.oninput = function () { _updateClearButton( obj ) ; ev_onValue( obj ); } obj.content.input.onfocus = function() { setTimeout ( function(){ obj.content.input.scrollIntoView({behavior:"smooth"});},300) } obj.content.input.onpropertychange = obj.content.input.oninput(); function ev_onValue( obj ){ function x(){ if ( 0 < obj.value() ) return true; return false; } if ( typeof ev_onValue.state == "undefined" ){ ev_onValue.state = !( x() ); } if ( ev_onValue.state != x() ){ ev_onValue.state = x(); obj.content.ev = new CustomEvent( ("onValue_" + obj.id) , { detail : ev_onValue.state }); window.dispatchEvent ( obj.content.ev ); } } } function _enable( isTrue , ref ) { ref.content.input.disabled = !( isTrue ); _updateClearButton( ref ); if ( isTrue ) ref.wrapper.style.opacity = "1"; else ref.wrapper.style.opacity = "0.3"; } function _updateClearButton( ref ) { ref.content.clearButton.disabled = ( !( ref.enabled ) && ( '' == ref.content.input.value || null == ref.content.input.value ) ); if ( true == ref.content.clearButton.disabled ) ref.content.clearButton.style.opacity = "0.3"; else ref.content.clearButton.style.opacity = "1"; } // public interface this.applyTo = function ( el ) { if ( az.wrap._wrap ){ var obj = new az.wrap._wrap( el ); build_input_int( obj ); return obj; } else{ console.log("missing az::_wrap!") // load it } } }).apply( az.wrap.input_int ); ( function (){ function build_display( obj ) { obj.content.display = document.createElement ("div"); obj.content.display.className = "az_display scrollable"; obj.content.display.style.maxWidth="none"; obj.content.display.style.width="none"; obj.content.display.style.left = "0px"; obj.content.display.style.right = "0px"; obj.content.display.style.minHeight = "20px"; setMaxHeight( obj ); window.addEventListener( "orientationchange" , function () { setMaxHeight( obj ); obj.content.display.scrollTop = obj.content.display.scrollHeight; }); obj.wrapper.appendChild ( obj.content.display ); obj.clear = function () { obj.content.display.innerHTML = null; } obj.addT = function ( text ) { obj.content.display.innerHTML += text; } obj.addText = function ( text ) { obj.content.display.innerHTML += text; obj.newLine (); } obj.newLine = function() { obj.content.display.innerHTML += ("
"); obj.content.display.scrollTop = obj.content.display.scrollHeight; } } function setMaxHeight( obj ) { if ( 500 < window.innerHeight ){ obj.content.display.style.maxHeight = parseInt( window.innerHeight / 2 ) + "px"; } } // public interface this.applyTo = function ( el ) { if ( az.wrap._wrap ){ var obj = new az.wrap._wrap( el ); build_display( obj ); return obj; } else{ console.log("missing az::_wrap!") // load it } } }).apply( az.wrap.display ); var ref = {}; // DOM references window.onload = function () { ref.button_range = document.getElementById("button_range"); ref.button = document.getElementById("button_check"); ref.task = document.getElementById("task"); ref.symbol = az.wrap.pimp( document.getElementById("symbol") ); ref.test = az.wrap.display.applyTo( document.getElementById ("test") ); ref.input_01 = az.wrap.input_int.applyTo( document.getElementById("input_01") ); ref.input_02 = az.wrap.input_int.applyTo( document.getElementById("input_02") ); ref.input_02.disable(); window.addEventListener( "onValue_input_01" , onValue_input_01 ); window.addEventListener( "onValue_input_02" , onValue_input_02 ); window.addEventListener( "onValue_input_01" , xf); }; function onValue_input_01( e ) { if ( e.detail ){ ref.input_02.enable(); ref.button.disabled = false; ref.button.style.opacity = "1"; } else { ref.input_02.disable(); ref.button.style.opacity = "0.3"; ref.button.disabled = true; } } function xf( e ) { if ( e.detail && ref.input_02.value() > 0 ){ ref.button_range.style.opacity = "1"; ref.button_range.disabled = false; } else { ref.button_range.style.opacity = "0.3"; ref.button_range.disabled = true; } } function onValue_input_02( e ) { if ( e.detail && ( 0 < ref.input_01.value() ) ){ ref.button_range.style.opacity = "1"; ref.button_range.disabled = false; } else { ref.button_range.style.opacity = "0.3"; ref.button_range.disabled = true; } } function showExample() { alert("Input: 8\n"+ "Output: true\n\n"+ "2 is a prime divisor of 8, and 2x2=4 is also a divisor of 8"); } function test() { if ( ref.input_01.value() ){ var x = isLab( ref.input_01.value() ); // ref.test.clear (); ref.test.addText ( ref.input_01.value() + ": " + x );} } function on_button_range() { // ref.test.newLine(); ref.test.addText("__ Range " + ref.input_01.value() + "_" + ref.input_02.value() ); var x = labInRange( ref.input_01.value() , ref.input_02.value() ); for ( var i = 0 ; i < x.length ; ++i ){ ref.test.addT( x[ i ] + " " ); } ref.test.newLine(); } /* * * * * * * * * * DATA ELABORATION * * - isPrime( ) * - getDivisors( ) * - filterToPrime( ) * - getDivisors( ) * - isLab( ) * - filterToLab( ) * */ function isLab( x , primes ) { isOk = false ; if ( primes == undefined ) primes = sieve( x ); var sq ; for ( var i = 0 ; primes[ i ] < x ; ++i ){ if ( 0 == x % primes[ i ] ){ sq = primes[ i ] * primes[ i ]; if ( 0 == x % sq && x > sq ) isOk = true ; else return false ; } } return isOk ; } function labInRange( x , y ) { var labFinded = []; var temp; if ( x > y ){ temp = x; x = y; y = temp; } var primes = sieve( y ); for ( var i = x ; i <= y ; ++i ) if ( isLab( i , primes ) ) labFinded.push( i ); return labFinded; } function sieve( x ) { var i = 0 , j = 0; var array = []; var limit = Math.sqrt( x ); var output = []; for ( i = 0 ; i < x ; ++i ) array.push( true ); for ( i = 2 ; i <= limit ; ++i ) if ( true === array[ i ] ) for ( j = i * i ; j < x ; j += i ) array[ j ] = false; for ( i = 2 ; i < x ; ++i ) if ( true === array[ i ] ) output.push( i ); return output ; }

LAB NUMBERS