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Javascript what is property in hasOwnProperty?
...on which you are calling it has a property with the name of the argument. For example:
var x = {
y: 10
};
console.log(x.hasOwnProperty("y")); //true
console.log(x.hasOwnProperty("z")); //false
However, it does not look at the prototype chain of the object.
It's useful to use it when you enum...
Difference between a Postback and a Callback
I keep on hearing this words ' callback ' and ' postback ' tossed around.
What is the difference between two ?
6 Answers...
Access mysql remote database from command line
...remote mysql console, use the below command:
mysql -u {username} -p'{password}' \
-h {remote server ip or name} -P {port} \
-D {DB name}
For example
mysql -u root -p'root' \
-h 127.0.0.1 -P 3306 \
-D local
no space after -p as specified in the documentation
It will tak...
Is there a way to override class variables in Java?
...e).Just don't declare the variable but initialize (change) in the constructor or static block.
The value will get reflected when using in the blocks of parent class
if the variable is static then change the value during initialization itself with static block,
class Son extends Dad {
static {...
How to make div background color transparent in CSS
I'm not using CSS3. So I can't use opacity or filter attributes. Without using these attributes how can I make the background-color transparent of a div ? It should be kind of the text box example in this link . Here the text box background color is transparent. I want to make the same, but ...
Read/Write 'Extended' file properties (C#)
...extended file properties in C#
e.g. Comment, Bit Rate, Date Accessed, Category etc that you can see in Windows explorer.
Any ideas how to do this?
EDIT: I'll mainly be reading/writing to video files (AVI/DIVX/...)
...
Allow user to set up an SSH tunnel, but nothing else
...ow a user to set up an SSH tunnel to a particular machine on a particular port (say, 5000), but I want to restrict this user as much as possible. (Authentication will be with public/private keypair).
...
Get name of current script in Python
...ile. When used in the main module, this is the name of the script that was originally invoked.
If you want to omit the directory part (which might be present), you can use os.path.basename(__file__).
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What, exactly, is needed for “margin: 0 auto;” to work?
...owever, I know that the element and its parent must meet certain criteria for the auto margin to work, and I can never seem to get the magic right.
...
What does “S3 methods” mean in R?
...
Most of the relevant information can be found by looking at ?S3 or ?UseMethod, but in a nutshell:
S3 refers to a scheme of method dispatching. If you've used R for a while, you'll notice that there are print, predict and summary methods for a lot o...