[Solved] Proper use of NULL in mysql query from php

NULL is a specific value, not a string literal. It should be passed to query directly, i.e. INSERT INTO `Schedule` (`ETA`,`STA`,`ATA`) VALUES (‘2013-08-28 12:30:00’, NULL, NULL); that means your PHP code should handle that and not enclose NULL-s: $timeFormatAndNull = function ($format) { return function($time) use ($format) { $time = strtotime($time); return $time ? strftime($format, … Read more

[Solved] Load null values in a SQL Query WHERE clause

Your first clause in your WHERE is only going to match rows where died is not null. given that, you can reorder the clauses something like: WHERE first_name NOT IN (‘Hannah’, ‘Julia’, ‘Frasier’) AND last_name NOT LIKE ‘%o%’ AND (nationality <> ‘German’ OR speciality <> ‘Photo’) AND ((died – born BETWEEN 50 AND 80 AND … Read more

[Solved] Checking int cast from null

If you try and cast null to an int, you will get a NullPointerException. If you want to null-check it, you can use an Integer or Object variable. Integer r = (Integer) map.get(“some_integer”); if (r==null) { // whatever you want to do in this case } else { int result = r; // whatever you … Read more

[Solved] iOS After NSDateFormatter Date is nil [duplicate]

Use a dateFormat string of @”yyyy-MM-dd HH:mm:ss Z” instead. Your dateFormat does not match the format of the string you’re trying to convert. By the way, there’s no point in converting [NSDate date] to a string and back again. Just use [NSDate date] and be done with it: NSDate *compareDateNow = [NSDate date]; NSComparisonResult result … Read more

[Solved] What value is stored in an initialized but empty integer array in Java [closed]

If it is an Array of objects it will be initialized with null, if it’s an array of primitive values (like int) it will be initialized with 0. For the non-number primitive boolean it is false and for ‘char’ it is ‘\u0000’. For more information, check the table Default Values on the following page: http://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html … Read more

[Solved] Is there a way to combine Java8 Optional returning a value with printing a message on null?

Use orElseGet: Optional<String> startingOptional = getMyOptional(); String finishingValue = startingOptional.orElseGet(() -> { System.out.println(“value not found”); return “”; }); Using .map(value -> value) is useless: transforming a value into itself doesn’t change anything. solved Is there a way to combine Java8 Optional returning a value with printing a message on null?

[Solved] My ListView is null and i don’t get why

Introduction If you are having trouble understanding why your ListView is null, you are not alone. Many developers have encountered this issue and have had difficulty resolving it. This article will provide an overview of the common causes of a null ListView and provide some tips on how to troubleshoot and resolve the issue. We … Read more

[Solved] Using a Case Statement With IS NULL and IS NOT NULL

You are misusing the case expression. There are two forms. The form you want is: (CASE WHEN userName IS NULL THEN ‘was null’ WHEN userName IS NOT NULL THEN ‘was not null’ END) AS caseExpressionTest Note: There is no userName after the CASE. This checks each condition stopping at the first. MySQL interprets booleans as … Read more