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What does it mean: The serializable class does not declare a static final serialVersionUID field? [d
...ates with each serializable class a version number, called a serialVersionUID, which is used during deserialization to verify that the sender and receiver of a serialized object have loaded classes for that object that are compatible with respect to serialization. If the receiver has loaded a class ...
Can Selenium Webdriver open browser windows silently in background?
...esn't suit everyone's requirements, it is a little bit of a hack:
How to hide Firefox window (Selenium WebDriver)?
and
Is it possible to hide the browser in Selenium RC?
You can 'supposedly', pass in some parameters into Chrome, specifically: --no-startup-window
Note that for some browsers, esp...
NSDictionary - Need to check whether dictionary contains key-value pair or not
... @jbx72487 Dictionaries must contain objects; objectForKey: returns an id -- a pointer to an Objective-C object. If you are storing numbers, they must be "boxed" into an NSNumber. Even if the NSNumber is zero or false it will be still be a valid pointer and the above code will accurately detect ...
Revert to a commit by a SHA hash in Git? [duplicate]
...
When I did this I ended up with a bunch of Untracked Files in the working tree. However looking at the history I could see that those files did have a corresponding delete commit in that "Revert to SHA" commit. So after git reset -...
How can you programmatically tell an HTML SELECT to drop down (for example, due to mouseover)?
...okup for email adresses.
There are many JavaScript+HTML controls that provide this capability--look for autocomplete controls for ideas.
See this link for the Autocomplete control...http://ajaxcontroltoolkit.codeplex.com/
...
Check that Field Exists with MongoDB
...
Suppose we have a collection like below:
{
"_id":"1234"
"open":"Yes"
"things":{
"paper":1234
"bottle":"Available"
"bottle_count":40
}
}
We want to know if the bottle field is present or not?
Ans:
db.products.fi...
jQuery equivalent of getting the context of a Canvas
...TML element:
var myCanvasElem = $("#canvas").get(0);
Perhaps to help avoid any potential null object references since jquery returns null as an object but working with the element from .get(0) may not fail so silently... You can easily check if the canvas was found first before .get(0) like
if...
Git keeps prompting me for a password
....com/username/repo.git
git://github.com/username/repo.git
You can now validate with just the SSH key instead of the username and password.
If Git complains that 'origin' has already been added, open the .config file and edit the url = "..." part after [remote origin] as url = ssh://github/userna...
Do I use , , or for SVG files?
...se <img> with script fallbacks
to png version (for older IE and android < 3). One clean and simple
way to do that:
<img src="your.svg" onerror="this.src='your.png'">.
This will behave much like a GIF image, and if your browser supports declarative animations (SMIL) then those will ...
How to find/remove unused dependencies in Gradle
...
UPDATE: 28-06-2016: Android support to unused-dependency
In June, 2017, they have released the 4.0.0 version
and renamed the root project name "gradle-lint-plugin" to
"nebula-lint-plugin". They have also added Android support to
unused-depe...