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Differences between Exception and Error
...ions are the bread and butter of exception handling. The Javadoc explains it well:
An Error is a subclass of Throwable that indicates serious problems that a
reasonable application should not try to catch. Most such errors are abnormal
conditions.
Look at a few of the subclasses of Error,...
difference between primary key and unique key
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Primary Key:
There can only be one primary key in a table
In some DBMS it cannot be NULL - e.g. MySQL adds NOT NULL
Primary Key is a unique key identifier of the record
Unique Key:
Can be more than one unique key in one table
Unique key can have NULL values
It can be a candidate key
Unique k...
How to check whether a given string is valid JSON in Java
How do I validate a JSON string in Java? Or could I parse it using regular expressions?
19 Answers
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Automatically start forever (node) on system restart
...stem restart. Is there any way I can automatically start the node server (with forever) when the system restarts?
15 Answer...
Blank space at top of UITextView in iOS 10
I have UITextView with some text in it. Everything was fine with iOS 6 but now with iOS 7 it leaves the blank space on top and then place the text below the middle of the textview.
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“Unknown provider: aProvider
...pe, i18n ) { /* ... */ }
This works just fine for AngularJS, but to make it work right with mangling, I had to change it to:
var applicationModule = angular.module( "example" );
function SomeController( $scope, i18n ) { /* ... */ }
applicationModule.controller( "SomeController", [ "$scope", "i18n...
What is the significance of load factor in HashMap?
...rties: size and load factor . I went through the Java documentation and it says 0.75f is the initial load factor. But I can't find the actual use of it.
...
how to show progress bar(circle) in an activity having a listview before loading the listview with d
I have a ListView in my second activity.OnItemClick of it I called a webservice and trying to fetch data. And after that I am moving to third activity which also have a ListView having description of previous activities ListView item.
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HTML5 Local Storage fallback solutions [closed]
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I use PersistJS (github repository), which handles client-side storage seamlessly and transparently to your code. You use a single API and get support for the following backends:
flash: Flash 8 persistent storage.
gears: Google Gears-based...
Using IPython notebooks under version control
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Here is my solution with git. It allows you to just add and commit (and diff) as usual: those operations will not alter your working tree, and at the same time (re)running a notebook will not alter your git history.
Although this can probably be...