![Ruby ampersand colon shortcut [duplicate]](/skin/wt/img/t.gif)
Possible Duplicate: What does map(&:name) mean in Ruby? In Ruby, I know that if I do:some_objects.each(&:foo)It's the same assome_objects.each { |obj| obj.foo }That is, &:foo creates the block { |obj| obj.foo }, turns it into a Proc, and
What is the use of bind() in JavaScript? 1:Bind creates a new function that will have this set to the first parameter passed to bind().Here's an example that shows how to use bind to pass a member method around that has the correct this:
I need to place a div (with position:absolute;) element in the center of my window. But I am having problems doing so, because the width is unknown.I tried this. But it needs to be adjusted as the width is responsive..center { left: 50%;
This question already has an answer here: Why do I get a segmentation fault when writing to a string initialized with “char *s” but not “char s[]”? 16 answers
In ES6, both of these are legal:var chopper = { owner: 'Zed', getOwner: function() { return this.owner; }};and, as shorthand:var chopper = { owner: 'Zed', getOwner() { return this.owner; }}Is it possible to use the new arrow fun
This question already has an answer here: What is the best way to read an entire file into a std::string in C++? 11 answers I need to read a whole file
I would like to ask how height and float work. I have an outer div and an inner div that has content in it. Its height may vary depending on the content of the inner div but it seems that my inner div will overflow its outside div. What wou
I'm terrible with regular expressions. I'm trying to replace this:public static function camelize($word) { return preg_replace('/(^|_)([a-z])/e', 'strtoupper("\\2")', $word);}with preg_replace_callback with an anonymous function. I don't
Trying to find some simple SQL Server PIVOT examples. Most of the examples that I have found involve counting or summing up numbers. I just want to pivot some string data. For example, I have a query returning the following.Action1 VIEW
I am looking for a CSS selector for the following table:Peter | male | 34Susanne | female | 12Is there any selector to match all TDs containing "male"? 1:If I read the specification correctly, no. You can match on an element, th
I would like to know the differences between these two types of URLs: relative URLs (for pictures, CSS files, JS files, etc.) and absolute URLs.In addition, which one is better to use? 1:In general, it is considered best-practice to use
I'm working on a projects which involves a lot of database writes, I'd say (70% inserts and 30% reads). This ratio would also include updates which I consider to be one read and one write. The reads can be dirty (e.g. I don't need 100% ac
Problem Description:I am facing some problem with AutoCompleteTextView where I have to show suggestions after each keypress.Thing is that, list of suggestion is dynamic like google's suggestion feature.It means the new suggestions should be
Optimizing SQLite is tricky. Bulk-insert performance of a C application can vary from 85 inserts per second to over 96,000 inserts per second!Background: We are using SQLite as part of a desktop application. We have large amounts of configu
What is the difference between a deep copy and a shallow copy? 1:Shallow copies duplicate as little as possible. A shallow copy of a collection is a copy of the collection structure, not the elements. With a shallow copy, two collectio
How can I generate a random whole number between two specified variables in Javascript, e.g. x = 4 and y = 8 would output any of 4, 5, 6, 7, 8? 1:There are some examples on the Mozilla Developer Network page:/** * Returns a random number
Here's the information according to the official documentation: There are four different pairs of opening and closing tags which can be used in PHP. Two of those, <?php ?> and <script language="php"> </script>, are always available. Th
Case One:new Date(Date.parse("Jul 8, 2005"));Output:Fri Jul 08 2005 00:00:00 GMT-0700 (PST)Case Two:new Date(Date.parse("2005-07-08"));Output:Thu Jul 07 2005 17:00:00 GMT-0700 (PST)Why is the second parse incorrect? 1:Until the 5th editi
NOTE: This question was asked from the viewpoint of ECMAScript version 3 or 5. The answers might become outdated with the introduction of new features in the release of ECMAScript 6.What exactly is the function of the var keyword in JavaScr
J0000000: Transaction A0001401 started on 8/22/2008 9:49:29 AM J0000010: Project name: E:\foo.pf J0000011: Job name: MBiek Direct Mail Test J0000100: Machine name: DEV J0000100: Project file: E:\mbiek\foo.pf J0000100: Template file: E:
I have 50 divs,But in my window it shows only 25,I do drag and drop activity on these divs.So If i drag my first div near 25th div,It should scroll automatically to show the remaining divs.How do i do this in jquery? any idea?I am using Nes
Let's say I've a resource articles at /articles.These articles may have related articles, so I fetch them by GETting /articles/{id}/related.What should I return is there is no related articles?I can think of:404 Not Found, maybe with an emp
I noticed that each line in the Dockerfile creates a separate image. Is there any limit on the number of images that are created? Should we try to do a oneliner of RUN cmd1 && cmd2 && cmd3 instead?How would this differ if we use a service l
How can I get the current branch or tag name for my working copy? I have seen references that indicate rev-parse --abbrev-ref HEAD will give branch name, but this doesn't work if the checkout is of a tag, in which case it just returns 'HEA
I recently downloaded the Advanced NSOperations sample app from Apple and found this code...// Operators to use in the switch statement.private func ~=(lhs: (String, Int, String?), rhs: (String, Int, String?)) -> Bool { return lhs.0 ~= r