public static MyClass {
private static volatile ProcessManager singleton = null;
public static ProcessManager getInstance() throws Exception {
if (singleton == null) {
synchronized (MyClass.class) {
if (singleton == null) {
singleton = new ProcessManager();
}
}
}
return singleton;
}
}The double-checking was invented prior to Java5.
The purpose is if the field isn't null, you don't have to synchronize. But since the java memory model specification was cleaned up and Synchronize/Volatile were given much better specification and semantics it is totally useless boilerplate that you should only write if you have to support Java4. There is a Google Tech Talk that covers this.
//read country intformation and assign to variables
cName = InpList.get(0).replace(",", ".");
cCode = InpList.get(1).replace(",", ".");
cAlpha2 = InpList.get(2).replace(",", ".");
cAbreviation = InpList.get(3).replace(",", ".");
dYear = InpList.get(4).replace(",", ".");
dPoliticalCompatibility = InpList.get(5).replace(",", ".");
dRankPoliticalCompatibility = InpList.get(6).replace(",", ".");
dEconomicCompatibility = InpList.get(7).replace(",", ".");
dRankEconomicCompatibility = InpList.get(8).replace(",", ".");
dMilitaryCompatibility = InpList.get(9).replace(",", ".");
dRankMilitaryCompatibility = InpList.get(10).replace(",", ".");
dDemoScore = InpList.get(11).replace(",", ".");
dRankDemoScore = InpList.get(12).replace(",", ".");
dEnvironmentalCompatibility = InpList.get(13).replace(",", ".");
dRankEnvironmentalCompatibility = InpList.get(14).replace(",", ".");
dSumCompatibility = InpList.get(15).replace(",", ".");
dRankCompatibility = InpList.get(16).replace(",", ".");
dPoliticalUtility = InpList.get(17).replace(",", ".");
dRankPoliticalUtility = InpList.get(18).replace(",", ".");
dEconomicUtility = InpList.get(19).replace(",", ".");
dRankEconomicUtility = InpList.get(20).replace(",", ".");
dMilitaryUtility = InpList.get(21).replace(",", ".");
dRankMilitaryUtility = InpList.get(22).replace(",", ".");
dEnvironmentalUtility = InpList.get(23).replace(",", ".");
dRankEnvironmentalUtility = InpList.get(24).replace(",", ".");
dSumUtility = InpList.get(25).replace(",", ".");
dRankUtility = InpList.get(26).replace(",", ".");
dPoliticalScore = InpList.get(27).replace(",", ".");
dRankPoliticalScore = InpList.get(28).replace(",", ".");
dEconomicScore = InpList.get(29).replace(",", ".");
dRankEconomicScore = InpList.get(30).replace(",", ".");
dMilitaryScore = InpList.get(31).replace(",", ".");
dRankMilitaryScore = InpList.get(32).replace(",", ".");
dEnvironmentalScore = InpList.get(33).replace(",", ".");
dRankEnvironmentalScore = InpList.get(34).replace(",", ".");
dAggregate = InpList.get(35).replace(",", ".");
dRankAggregate = InpList.get(36).replace(",", ".");function renderGroupSelectedSuccessors() {
var index = 0;
if (tempSuccessorsGroupsList != null && tempSuccessorsGroupsList.length > 0) {
var groups = tempSuccessorsGroupsList.splice(0, PageSettings.lazyRenderItemsPerPage);
var groupSuccessors = '';
for (var i = 0; i < groups.length; i++) {
if (index % 10 == 0) {
groupSuccessors += '<div style="float: left;"><ul>';
}
groupSuccessors += '<li><a data-groupid="'+groups[i].GroupID+'">' + groups[i].GroupName + '</a></li>';
index++;
if (index % 10 == 0 || i == groups.length - 1) {
groupSuccessors += '</ul></div>';
}
}
$('#divGroupSuccessorsList').append(groupSuccessors);
SetCheckBoxState();
setTimeout(renderGroupSelectedSuccessors, 50);
}
}Where does the data come from? Where does it go? Why isn't this an endless recursive loop? Why has this worked for three years?
let showDots = typeof project.showDots === 'boolean' ? project.showDots : false;
if (showDots) {
// Somecode ...
}Why, just why??
//Calculates x² of an integer up to ±1 million
var square = (function () {
var s = "if(A==B){return C;}";
var func = "var A=Math.abs(D|0);";
for (var i = 0; i <= 1000000; i++) {
func += s.replace(/B/, i).replace(/C/, i * i);
}
return new Function("D", func + "return Infinity;");
})();<?php
$k =1;
for($v = 0; $v < $nt; $v++) {
$bgClass= 'blueBg';
if($k > 1 && $k%2 == 0){
$bgClass= 'whiteBg';
}
?>
<tr class="row_tr <?php echo $bgClass;?>">
<td class="row_td td_column_0"> </td>
<td class="row_td column_1"><?php echo $rows[$v]['nothing'];?></td>
...
<td class="row_td td_column_0"> </td>
</tr>
<?php
$k++;
}
?>
let length str =
let len = String.length str in
let rec length_helper str curr =
if str = "" then 0 else 1 + length_helper (String.sub str 1 (len - curr - 1)) (curr + 1)
in length_helper str 0;;We use this code internally at Google. JFC.
// IsFooBar being a boolean, we check if it's different from true and from false
if (x.IsFooBar != true && x.IsFooBar != false)
{
return "error";
}x.IsFooBar is juste a regular bool
if(!strncmp(pcTagName,strlim,(int)strlen(strlim))) return "";public override List<Value> Values
{
get
{
if (_values == null && shouldLoadLazily)
{
_values = _lazerLoader.LoadValues<Value>()
}
return _values;
}
set
{
throw new InvalidOperationException("Values are actually readonly- please set in constructor")
}
}How to create immutable fields in c#
const ws = new WebSocket('wss://echo.websocket.org', {
agent: new HttpsProxyAgent(`https://${proxy}`)
});
wsz.push(ws);
ws.onopen = () => {
if (ws.readyState === WebSocket.OPEN) {
.....
ws.close();
}
};
ws.onerror = () => {
ws.close();
};u just cant trust, just cant......
if (date.Training != null)
{
var training = date.Training;
var status = new TrainingStatus();
var refresher = new Training();
if (training.Trainings != null)
refresher = training.Trainings;
bool hasTakenRefresher = false;
status.Value = date.Date.AddDays(
TrainingHelper.CalculateValidityDays(training.Validity ?? 0, training.ValidityType ?? 0));
status.Name = training.TrainingName;
status.ID = training.TrainingID;
status.Category = training.CategoryTraining != null ? training.CategoryTraining.Name : "Other";
status.IsTrained = _validityUtilsService.IsValid(training, date.Date);
if (status.IsTrained)
{
status.IsExpiring = _validityUtilsService.IsExpiring(training, date.Date,
TrainingHelper.CalculateValidityDays(
training.ExpirationWarningValidity ?? 0,
training.ExpirationWarningValidityType ?? 0));
}
if (refresher.ID != 0)
{
hasTakenRefresher = employee.Dates
.Count(x => x.Training != null
&& x.TrainingID == refresher.ID) > 1;
if (hasTakenRefresher && (status.IsExpiring || !status.IsTrained))
{
status.IsExpiring = false;
var trainingWithNewValidity = new Training();
status.Value = date.Date.AddDays(
TrainingHelper.CalculateValidityDays(training.ValidityRefresher ?? 0,
training.ValidityRefresherType ?? 0));
trainingWithNewValidity.Validity = training.ValidityRefresher;
trainingWithNewValidity.ValidityType = training.ValidityRefresherType;
status.IsTrained = _validityUtilsService.IsValid(trainingWithNewValidity, date.Date);
if (status.IsTrained)
{
status.IsExpiring = _validityUtilsService.IsExpiring(trainingWithNewValidity, date.Date,
TrainingHelper.CalculateValidityDays(
refresher.ExpirationWarningValidity ?? 0,
refresher.ExpirationWarningValidityType ?? 0));
}
}
}
if (status.IsTrained && !status.IsExpiring)
status.Status = TrainingStatuses.Trained;
else if (status.IsTrained && status.IsExpiring)
status.Status = TrainingStatuses.Expiring;
else if (!status.IsTrained && !status.IsExpiring)
status.Status = TrainingStatuses.Expired;
status.EmpID = employee.ID;
return status;
}test
//JSONObject input;
String givenName = input.get("propName") != null ? (String)input.get("propName") : null;
WHAT DA FUCK ASSHOLES
foreach($bookings as $booking) {
$status = $apiController->getBookingStatus($booking);
if($status->error == 1) {
switch($status->message) {
case "FIND_PRV_KO": continue; //Wrong parameters
case "ERR_PREN_NOTFOUND": continue; //Request booking cannot be found
case "ERR_PRV_NOTFOUND": continue; //Check-in not carried out
default: continue;
};
continue;
}
//DO SOME STUFF...
}Found this on a production website
try {
synchronized(this) {
Object obj = null;
if (obj.hashCode() == -1) {
obj = new Object();
}
}
} catch (Throwable t) {
throw t;
} finally {
try {
synchronized(this) {
Object obj = null;
if (obj.hashCode() == -1) {
obj = new Object();
}
}
} catch (Throwable t) {
throw t;
} finally {
try {
synchronized(this) {
Object obj = null;
if (obj.hashCode() == -1) {
obj = new Object();
}
}
} catch (Throwable t) {
throw t;
} finally {
System.exit(1);
}
}
}Cool code