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How to check if an object is a certain type
...full to others.
First, some definitions:
There are TypeNames, which are string representations of the type of an object, interface, etc. For example, Bar is a TypeName in Public Class Bar, or in Dim Foo as Bar. TypeNames could be seen as "labels" used in the code to tell the compiler which type d...
No @XmlRootElement generated by JAXB
...f instead of doing:
UserType user = (UserType) unmarshaller.unmarshal(new StringReader(responseString));
one should do:
JAXBElement<UserType> userElement = unmarshaller.unmarshal(someSource, UserType.class);
UserType user = userElement.getValue();
The latter code will not require @XmlRoo...
What is the correct way of using C++11's range-based for?
....
This is inefficient code, e.g., if these elements are instances of std::string,
heap memory allocations can be done, with expensive trips to the memory manager, etc.
This is useless if we just want to observe the elements in a container.
So, a better syntax is available: capture by const referen...
How can I check that a form field is prefilled correctly using capybara?
...elected answer because the error message shows you the expected and actual strings. This gives the unhelpful "expected field "my field" to return something" error. But this one does definitely read better and follows the page matcher API better. Upvotes all around!!!
– mraaronc...
Declaring and initializing variables within Java switches
...tag
case 1:
b = false;
case 2:{
//String b= "test"; you can't declare scope here. because it's in the scope @top
b=true; // b is still accessible
}
case 3:{
boolean c= true; // case c scope only
b=true; // c...
How to write multiple line property value using PropertiesConfiguration?
...aracter, you can specify it with the same
escaped notation used for Java Strings. The list separator ("," by
default), can also be escaped:
key = This \n string \t contains \, escaped \\ characters \u0020
Backslashes are more difficult.
Lists and arrays:
You can specify a list of val...
Do HTML5 custom data attributes “work” in IE 6?
....match(new RegExp(/^data-/))) {
// remove the 'data-' from the string
dataset[attr.nodeName.replace(new RegExp('^data-'), '')] = attr.nodeValue;
}
}
return dataset;
}
share
...
Display current date and time without punctuation
... or newer):
${parameter@operator} - P operator
The expansion is a string that is the result of expanding the value of parameter as if it were a prompt string.
$ show_time() { local format='\D{%Y%m%d%H%M%S}'; echo "${format@P}"; }
$ show_time
20180724003251
...
Which $_SERVER variables are safe?
...ocation, not usually a concern for web servers)
'REQUEST_METHOD' §
'QUERY_STRING'
'HTTP_ACCEPT'
'HTTP_ACCEPT_CHARSET'
'HTTP_ACCEPT_ENCODING'
'HTTP_ACCEPT_LANGUAGE'
'HTTP_CONNECTION'
'HTTP_REFERER'
'HTTP_USER_AGENT'
'AUTH_TYPE' ‖
'PHP_AUTH_DIGEST' ‖
'PHP_AUTH_USER' ‖
'PHP_AUTH_PW' ‖
'PATH_IN...
What do column flags mean in MySQL Workbench?
...
PK - Primary Key
NN - Not Null
BIN - Binary (stores data as binary strings. There is no character set so sorting and comparison is based on the numeric values of the bytes in the values.)
UN - Unsigned (non-negative numbers only. so if the range is -500 to 500, instead its 0 - 1000, the ...