Browser detection in JavaScript? [duplicate]

Browser detection in JavaScript? [duplicate]

This question already has an answer here: How can you detect the version of a browser? 22 answers How do I determine the exact browser and version usin

What is Double Brace initialization in Java?

What is Double Brace initialization in Java?

What is Double Brace initialization syntax ({{ ... }}) in Java? 1:Double brace initialisation creates an anonymous class derived from the specified class (the outer braces), and provides an initialiser block within that class (the inner

How do I round a decimal value to 2 decimal places (for output on a page)

How do I round a decimal value to 2 decimal places (for output on a page)

When displaying the value of a decimal currently with .ToString(), it's accurate to like 15 decimal places, and since I'm using it to represent dollars and cents, I only want the output to be 2 decimal places. Do I use a variation of .ToStr

Once for all, how to correctly save instance state of Fragments in back stack?

Once for all, how to correctly save instance state of Fragments in back stack?

I have found many instances of a similar question on SO but no answer unfortunately meets my requirements.I have different layouts for portrait and landscape and I am using back stack, which both prevents me from using setRetainState() and

Send and receive messages through NSNotificationCenter in Objective-C? [closed]

Send and receive messages through NSNotificationCenter in Objective-C? [closed]

I am attempting to send and receive messages through NSNotificationCenter in Objective-C. However, I haven't been able to find any examples on how to do this. How do you send and receive messages through NSNotificationCenter? 1:@implemen

How do I use NSTimer?

How do I use NSTimer?

How do I use an NSTimer? Can anyone give me step by step instructions? 1:Firstly I'd like to draw your attention to the Cocoa/CF documentation (which is always a great first port of call). The Apple docs have a section at the top of each

Dynamically select data frame columns using $ and a vector of column names

Dynamically select data frame columns using $ and a vector of column names

I wish to order a data frame based on different columns, one at a turn. I have a character vector with the relevant column names on which the order should be based:parameter <- c("market_value_LOCAL", "ep", "book_price", "sales_price", "div

Default constructor with empty brackets

Default constructor with empty brackets

Is there any good reason that an empty set of round brackets (parentheses) isn't valid for calling the default constructor in C++?MyObject object; // ok - default ctorMyObject object(blah); // okMyObject object(); // errorI seem to typ

How to parse JSON in Java

How to parse JSON in Java

I have the following JSON text. How can I parse it to get pageName, pagePic, post_id, etc.?{ "pageInfo": { "pageName": "abc", "pagePic": "http://example.com/content.jpg" } "posts": [ { "post_id":

How can I count unique pairs of values in SQL?

How can I count unique pairs of values in SQL?

With the following sql statement I can get all unique values with their counts for a given column:select column, count(column) as count from table group by column order by count desc;How would I get all unique pairs of values with

Competing Consumer on Redis Pub/Sub supported?

Competing Consumer on Redis Pub/Sub supported?

I have 2 services. Both of them need subscribe to the same channel.The 2 services are load balanced. Each service runs on multiple servers.So how can I be sure only 1 instance of each service consume the message of that channel.Is this supp

Remove double quotes from string

Remove double quotes from string

I'm trying to grab data from a MySQL database and use Ruby to reformat it into a flat text file. Some of my MySQL data contains double quotes like so: Matthew "Matt" Perryand I need to remove those quotes and replace them with something el

Python's hasattr on list values of dictionaries always returns false?

Python's hasattr on list values of dictionaries always returns false?

I have a dictionary that sometimes receives calls for non-existent keys, so I try and use hasattr and getattr to handle these cases:key_string = 'foo'print "current info:", infoprint hasattr(info, key_string)print getattr(info, key_string,

Unrecognized selector sent to instance while archiving data (NSCoding)

Unrecognized selector sent to instance while archiving data (NSCoding)

-(void)transformObjects:(NSMutableArray*)array key:(NSString*)key{ NSMutableArray* archiveArray = [[NSMutableArray alloc]initWithCapacity:array.count]; for (Furniture *furniture in array) { // The error occurs on the line below

Reloading model in laravel

Reloading model in laravel

In some of my tests, I have a user model I have created and I run some methods that need to save certain attributes. In rails, I would typically call something like user.reload which would repopulate the attributes from the database.Is ther

Optional parameter in cucumber

Optional parameter in cucumber

I have a step definition in which I'd like to have an optional parameter. I believe an example of two calls to this step explains better than anything else what I'm after.I check the favorite color countI check the favorite color count for

Why do I have to copy “this” when using LINQ in a struct (and is it OK if I do)?

Why do I have to copy “this” when using LINQ in a struct (and is it OK if I do)?

The code belows contains a simple LINQ query inside an immutable struct. struct Point{ static readonly List NeighborIndexes; //and other readonly fields! public IEnumerable GetEdges() { return from neighborIndex in Neighbor

XAML : Binding textbox maxlength to Class constant

XAML : Binding textbox maxlength to Class constant

I am attempting to bind a WPF textbox's Maxlength property to a known constant deep within a class. I am using c#.The class has a structure not too dissimilar to the following:namespace Blah{ public partial class One { public p

In Python, is object() equal to anything besides itself?

In Python, is object() equal to anything besides itself?

If I have the code my_object = object() in Python, will my_object be equal to anything except for itself?I suspect the answer lies in the __eq__ method of the default object returned by object(). What is the implementation of __eq__ for thi

Why Object#hashCode() returns int instead of long

Why Object#hashCode() returns int instead of long

why not:public native long hashCode();instead of: public native int hashCode();for higher chance of achieving unique hash codes? 1:Because the maximum length of an array is Integer.MAX_VALUE. Since the prime use of hashCode() is to deter

Query MongoDB Using 'ObjectId'

Query MongoDB Using 'ObjectId'

I have inserted documents into MongoDB without an id. And I want to retrieve them by searching through their MongoDB ObjectId, that has been assigned in default.Here is my attempt-var query_id = Query.EQ("_id", "50ed4e7d5baffd13a44d0153");v

Should you avoid static classes?

Should you avoid static classes?

are static classes considered bad practice? I read an article about this a couple days ago (can't find it, sorry) which basically said that having static classes (especially those 'helper' classes) are typically a sign of bad code. Is this

Python LRU Cache Decorator Per Instance

Python LRU Cache Decorator Per Instance

Using the LRU Cache decorator found here:http://code.activestate.com/recipes/578078-py26-and-py30-backport-of-python-33s-lru-cache/from lru_cache import lru_cacheclass Test: @lru_cache(maxsize=16) def cached_method(self, x): r

Why does the 2-tuple Functor instance only apply the function to the second element?

Why does the 2-tuple Functor instance only apply the function to the second element?

import Control.Applicativemain = print $ fmap (*2) (1,2)produces (1,4). I would expect it it to produce (2,4) but instead the function is applied only to the second element of the tuple.Update I've basically figured this out almost straight

Using sql date data type and EF4

Using sql date data type and EF4

I have a table w/ a sql date data type. When I look at the EDM markup, the storage element reflects this. The conceptual entity has a data type of DateTime (there doesn't appear to be a Date data type). When I call save changes and have a D