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Explanation of JSONB introduced by PostgreSQL
... spec).
F.ex. these are valid JSON representations: null, true, [1,false,"string",{"foo":"bar"}], {"foo":"bar","baz":[null]} - hstore is just a little subset compared to what JSON is capable (but if you only need this subset, it's fine).
The only difference between json & jsonb is their storag...
Can an array be top-level JSON-text?
...sequence of tokens. The set of tokens includes six structural characters, strings, numbers, and three literal names."
– antak
Mar 10 '16 at 11:34
add a comment
...
Best practices for overriding isEqual: and hash
...iplying the result by each variable hash your result will overflow. eg. [NSString hash] creates large values. If you have 5+ variables it's easy to overflow with this algorithm. It'll result in everything mapping to the same hash, which is bad. See my response: stackoverflow.com/a/4393493/276626
...
Android - custom UI with custom attributes
...rence (to another resource), color, boolean, dimension, float, integer and string. They are pretty self-explanatory
2. Use the attributes in your layout
That works the same way you did above, with one exception. Your custom attribute needs it's own XML namespace.
<com.example.yourpackage.MyCus...
How to Customize the time format for Python logging?
... class:
The constructor takes two optional arguments: a message format string and a date format string.
So change
# create formatter
formatter = logging.Formatter("%(asctime)s;%(levelname)s;%(message)s")
to
# create formatter
formatter = logging.Formatter("%(asctime)s;%(levelname)s;%(messa...
Init method in Spring Controller (annotation version)
... public Object postProcessBeforeInitialization(Object bean,
String beanName) throws BeansException {
System.out.println("BeforeInitialization : " + beanName);
return bean; // you can return any other object as well
}
public Object postProcessAfterInitialization(O...
When do I use a dot, arrow, or double colon to refer to members of a class in C++?
...
#include <iostream>
#include <string>
using namespace std;
class Human {
private:
int age;
public:
string name;
Human(int humanAge, string humanName)
: age(humanAge), name(std::move(humanName)) {}
void DoSomething() {
...
Executing an EXE file using a PowerShell script
...oks like you're specifying both the EXE and its first argument in a single string e.g; '"C:\Program Files\Automated QA\TestExecute 8\Bin\TestExecute.exe" C:\temp\TestProject1\TestProject1.pjs /run /exit /SilentMode'. This won't work. In general you invoke a native command that has a space in its pa...
sed: print only matching group
...
Also remember to add .* to the end of the regexp if the string you want to extract is not always at the end of the line.
– Teemu Leisti
Nov 22 '17 at 8:54
...
How to percent-encode URL parameters in Python?
...
Python 2
From the docs:
urllib.quote(string[, safe])
Replace special characters in string
using the %xx escape. Letters, digits,
and the characters '_.-' are never
quoted. By default, this function is
intended for quoting the path section
of the U...