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Is it better to return null or empty collection?
That's kind of a general question (but I'm using C#), what's the best way (best practice), do you return null or empty collection for a method that has a collection as a return type ?
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What is the !! (not not) operator in JavaScript?
I saw some code that seems to use an operator I don't recognize, in the form of two exclamation points, like so: !! . Can someone please tell me what this operator does?
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How to position a table at the center of div horizontally & vertically
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Centering is one of the biggest issues in CSS. However, some tricks exist:
To center your table horizontally, you can set left and right margin to auto:
<style>
#test {
width:100%;
height:100%;
}
table {
m...
How to make connection to Postgres via Node.js
I find myself trying to create a postgres database, so I installed postgres and started a server with initdb /usr/local/pgsql/data , then I started that instance with postgres -D /usr/local/pgsql/data now how can I interact with this through node? For example, what would the connectionstring be...
Why would a JavaScript variable start with a dollar sign? [duplicate]
...t start with a dollar sign. When/why would you choose to prefix a variable in this way?
16 Answers
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Select multiple images from android gallery
So basically what i am trying to achieve is opening the Gallery in Android and let the user select multiple images . Now this question has been asked frequently but i'm not satisfied with the answers. Mainly because i found something interesting in de docs in my IDE (i come back on this later) ...
Is it possible to declare a variable in Gradle usable in Java?
Is it possible to declare a variable in Gradle usable in Java ?
Basically I would like to declare some vars in the build.gradle and then getting it (obviously) at build time. Just like a pre-processor macros in C/C++...
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How do I use pagination with Django class based generic ListViews?
How do I use pagination with Django 1.3?
3 Answers
3
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Is there a method to generate a UUID with go language
...purpose ?
u[6] = (u[6] | 0x40) & 0x4F // what's the purpose ?
These lines clamp the values of byte 6 and 8 to a specific range. rand.Read returns random bytes in the range 0-255, which are not all valid values for a UUID. As far as I can tell, this should be done for all the values in the slic...
AngularJS browser autofill workaround by using a directive
When submitting a form in AngularJS and use the browser remember password functionality, and in a subsequent login attempt you let the browser fill in the login form with the username and password, the $scope model won't be changed based on the autofill.
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