should i be single

pythonraw_input should accept only single character 2015-06-27

Possible Duplicate: Python read a single character from the user I am using below code.But instead of accepting a single character its allowing user to put more than a single character. How can I fix that? guess = raw_input(':') guessInLower = guess.

When should you use single or double quotes in PHP 2015-08-13

This question already has an answer here: Single quotes or double quotes for variable concatenation? [closed] 10 answers What is the difference between single-quoted and double-quoted strings in PHP? 9 answers Forgive the bluntness of the question, b

stringWhen to Use Double or Single Quotes in JavaScript 2015-06-22

console.log("double"); vs console.log('single'); I see more and more JavaScript libraries out there using single quotes when handling strings. What are the reasons to use one over the other? I thought they're pretty much interchangeable. I would

stringHow to use single quotes within double quotes in PHP 2015-08-09

Creating a link in PHP: echo "<a href=\"$currentFile?rowID=$row['id']\">click here</a>"; This throws an error: Parse error: parse error, expecting 'T_STRING' or 'T_VARIABLE' or 'T_NUM_STRING'. How can you do this? Also, mix

revertReverting single file in SVN to a particular revision 2015-08-12

I have a file as shown below in an SVN repo that I would like to revert to a previous version. What is the way to do this in SVN? I want only downgrade this particular file to an older version, not the whole repo. Thanks. $ svn log --------

c++Should load-acquire see store-release immediately 2015-08-13

Suppose we have one simple variable(std::atomic<int> var) and 2 threads T1 and T2 and we have the following code for T1: ..., mem_order); ... and for T2 ... var.load(mem_order) ... Also let's assume that T2(load) executes 123ns later in

exceptionPHP eval and capturing errors (as much as possible) 2015-06-22

Disclaimer; I'm fully aware of the pitfalls and "evils" of eval, including but not limited to: performance issues, security, portability etc. The problem Reading the PHP manual on eval... eval() returns NULL unless return is called in the evalua

c++using boost sockets, do I need only one io_service 2015-06-23

having several connections in several different threads.. I'm basically doing a base class that uses boost/asio.hpp and the tcp stuff there.. now i was reading this: i

c++Detecting the types of individual enumeration constants 2015-06-23

The code below prints unsigned int as the underlying type of all the constants inside the enum Test #include <iostream> #include <type_traits> #include <typeinfo> #include <cxxabi.h> struct Test { enum { a = true, b = 1 }; }; stati

debuggingPHP Parse/Syntax Errors; and How to solve them 2015-06-23

Everyone runs into syntax errors. Even experienced programmers make typos. For newcomers it's just part of the learning process. But it's still simple to interpret error messages such as: PHP Parse error: syntax error, unexpected '{' in index.php on

phpMySQL PDO query optimization 2015-06-23

I'm trying to reduce this script execution time. It queries a database with about 2 million records about 1000 times on a loop: foreach ($ids as $id){ $stmt=$dbh->query("SELECT SQL_CACHE * FROM `ids` WHERE $id BETWEEN `id_start` AND `id_end`"

dispatch_once singleton model in swift 2015-06-24

I'm trying to work out an appropriate singleton model for usage in Swift. So far, I've been able to get a non-thread safe model working as: class var sharedInstance:TPScopeManager { get { struct Static { static var instance : TPScopeManager? = nil }

javaIncluding dependencies in a jar with Maven 2015-06-24

Is there a way to force maven(2.0.9) to include all the dependencies in a single jar file? I have a project the builds into a single jar file. I want the classes from dependencies to be copied into the jar as well. Update: I know that I cant just inc

javaOne DAO per entityhow to handle references 2015-06-24

I am writing an application that has typical two entities: User and UserGroup. The latter may contain one or more instances of the former. I have following (more/less) mapping for that: User: public class User { @Id @GeneratedValue private long id; @

javascriptUsing jQuery to test if an input has focus 2015-06-24

On the front page of a site I am building, several <div>s use the CSS :hover property to add a border when the mouse is over them. One of the <div>s contains a <form> which, using jQuery, will keep the border if an input within it has fo
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