I saw this construction in order to get the browser viewport width: function () { return window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth; } I understand the browser quirks involved. What I don't understand is why || returns the value. So I tried this alert(undefined || 0 || 3); and sure enough, i...
I can't for the life of me figure out this Sqlite syntax. Our database contains records like: TX, Austin OH, Columbus OH, Columbus TX, Austin OH, Cleveland OH, Dayton OH, Columbus TX, Dallas TX, Houston TX, Austin (State-field and a city-field.) I need output like this: OH: Columbus, Cleveland, Dayton TX: Dallas, Houston, Austin ...
in .json text, is the 'value' in a basic single pair object the title of a value type (e.g. [string, number, object]), or a value for a typed object (e.g. 2, or "dog", or Object3)? This is how http://www.json.org/ presents the information: "An object is an unordered set of name/value pairs. An object begins with { (left brace) a...
I'm new to Ruby, and I found the <%= @my_variable %> a little lengthy and less readable. Shouldn't erb have something like ${@my_variable} (like the good old Velocity engine in Java)? ...
This works: !function_exists('testfunc') and include("testfunc.php"); This will report syntax error: !function_exists('testfunc') and unset($q); Aren't they the same thing? ...
Suppose I have two classes defined the following way: public class A { public A() { foo(); } public void foo() { System.out.println("A"); } } public class B extends A { private String bar; public B() { bar = "bar"; } @Override public void foo() { System.out.println(bar); } } ...
In Python, I need a dictionary object which looks like: {'a': 10, 'b': 20, 'c': 10, 'd': 10, 'e': 20} I've been able to get this successfully by combining the dict.update() and dict.fromkeys() functions like so: myDict = {} myDict.update(dict.fromkeys(['a', 'b', 'c'], 10)) myDict.update(dict.fromkeys(['b', 'e'], 20)) However, bec...
I'm new in C# and earlier I saw the lambda expression is like (params) => { expression;} but in LINQ, I saw examples like IEnumerable<string> customerFirstNames = customers.Select(cust => cust.FirstName); No brackets. Are they the same or is there any difference? Thanks a lot. ...
Possible Duplicates: Do you recommend using semicolons after every statement in JavaScript? Why use semicolon? What are the ups and downs of using semicolons to end commands in JavaSript? What are the arguments for and against doing so? ...
if (file_exists($cachefile) && (time() - $cachetime < filemtime($cachefile)) && $_SERVER['REQUEST_URI'] != "login" || "thankyou" || "confirm") Should this code work, operators wise and syntax wise? ...
Parse error: syntax error, unexpected ':' ...
In jQuery, what's the difference between the following two constructions of jQuery.each: // Given var arr = [1,2,3,4], results = [], foo = function (index, element) { /* something done to/with each element */ results.push(element * element); // arbitrary thing. } // construction #1 $.each(arr, foo); // result...
I'm in the console, looking at someone else's app. I come across the following: >> p.location => [#<Tag id: 2, name: "projects">] Why do I see this result, which seems to be the object name, and how do I access the actual attribute name, "projects"? >> p.location.name => "Tag" Thank you very much! ...
I'm trying to create a WCHAR: LONG bufferSize = foo.bar() + 1; WCHAR wszBaz[bufferSize]; The compiler issues an error: error C2057: expected constant expression error C2466: cannot allocate an array of constant size 0 error C2133: 'wszBaz' unknown size What am I doing wrong? UPDATE: I added const but it still gives the same error:...
class EncodeDemoTest < Test #inheritance in ruby def setup(platform_info, logdir) @telnet_ip = platform_info["telnet_ip"] @telnet_login = platform_info["telnet_login"] @telnet_password = nil @filesys_path = platform_info[...
I've been having trouble searching for this answer because I am not quite sure how to phrase it. I am new to PHP and still getting my feet on the ground. I was writing a page with a class in it that had the property name. When I originally wrote the page there was no class so I just had a variable called $name. When I went to encapsu...
Hi, Can any one give me the syntax to truncate a table in IBM DB2. I m running the following command: truncate table tableName immediate; The eror is DB2 SQL Error: SQLCODE=-104, SQLSTATE=42601, SQLERRMC=table;truncate ;JOIN , DRIVER=3.50.152 Message: An unexpected token "table" was found following "truncate ". Expected tokens may in...
I have a method: odp(foo& bar); I'm trying to call it: foo baz; odp(&baz); I get a compiler error: error C2664: "odp" cannot convert parameter 1 from 'foo *' to 'foo &' What am I doing wrong? Aren't I passing in a reference to baz? UPDATE: Perhaps I have a misconception about the relationship between pointers and references. I ...
Coming from Java background I am guessing this is expected. I would really love to learn Objective-C and start developing Mac apps, but the syntax is just killing me. For example: -(void) setNumerator: (int) n { numerator = n; } What is that dash for and why is followed by void in parenthesis? I've never seen void in parenthesis...
I tried this but only got a syntax error: <?php $a = true; $str = <<< EOF {$a ? 1 : 2} EOF; echo $str; Is it possible to use such kind of conditional statement inside heredoc? ...