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Finding all objects that have a given property inside a collection [duplicate]
...icated object, such as a Cat, which has many properties, such as age, favorite cat food, and so forth.
20 Answers
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MySQL, better to insert NULL or empty string?
I have a form on a website which has a lot of different fields. Some of the fields are optional while some are mandatory. In my DB I have a table which holds all these values, is it better practice to insert a NULL value or an empty string into the DB columns where the user didn't put any data?
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Java SafeVarargs annotation, does a standard or best practice exist?
... examples on the Internet and on StackOverflow about the particular issue with generics and varargs. Basically, it's when you have a variable number of arguments of a type-parameter type:
<T> void foo(T... args);
In Java, varargs are a syntactic sugar that undergoes a simple "re-writing" at...
Checking if a string array contains a value, and if so, getting its position
... // the array contains the string and the pos variable
// will have its position in the array
}
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JavaScript code to stop form submission
... the function to prevent the form submission
<form name="myForm" onsubmit="return validateMyForm();">
and function like
<script type="text/javascript">
function validateMyForm()
{
if(check if your conditions are not satisfying)
{
alert("validation failed false");
return...
What is the rationale for all comparisons returning false for IEEE754 NaN values?
...values behave differently from all other values?
That is, all comparisons with the operators ==, =, where one or both values is NaN returns false, contrary to the behaviour of all other values.
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Is the creation of Java class files deterministic?
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Let's put it this way:
I can easily produce an entirely conforming Java compiler that never produces the same .class file twice, given the same .java file.
I could do this by tweaking all kinds of bytecode construction or by simply a...
Set environment variables on Mac OS X Lion
When someone says "edit your .plist file" or "your .profile" or ".bash_profile" etc, this just confuses me. I have no idea where these files are, how to create them if I have to do that, etc, and also why there seem to be so many different ones (why? Do they do different things?)
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Get the POST request body from HttpServletRequest
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In Java 8, you can do it in a simpler and clean way :
if ("POST".equalsIgnoreCase(request.getMethod()))
{
test = request.getReader().lines().collect(Collectors.joining(System.lineSeparator()));
}
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Python: most idiomatic way to convert None to empty string?
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edited Jul 13 '09 at 13:55
Vinko Vrsalovic
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