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Concatenate two string literals
I am reading Accelerated C++ by Koenig. He writes that "the new idea is that we can use + to concatenate a string and a string literal - or, for that matter, two strings (but not two string literals).
...
How to resolve “must be an instance of string, string given” prior to PHP 7?
...calar) string. The error message may be funny, but it's not supposed to work to begin with. Given the dynamic typing system, this actually makes some sort of perverted sense.
You can only manually "type hint" scalar types:
function foo($string) {
if (!is_string($string)) {
trigger_erro...
How do I output an ISO 8601 formatted string in JavaScript?
...ou want to pass a date object to a soap service... that is the way! :) Thanks.
– thinklinux
Dec 2 '14 at 22:17
1
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How to delete all datastore in Google App Engine?
Does anyone know how to delete all datastore in Google App Engine ?
28 Answers
28
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How do I group Windows Form radio buttons?
How can I group the radio buttons in Windows Form application (a lot like ASP.NET's radiobuttonlist!)?
9 Answers
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A non well formed numeric value encountered
...cript that will add those to a DB. I am having problems validating this. I keep getting the following errors
9 Answers
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Formula to determine brightness of RGB color
I'm looking for some kind of formula or algorithm to determine the brightness of a color given the RGB values. I know it can't be as simple as adding the RGB values together and having higher sums be brighter, but I'm kind of at a loss as to where to start.
...
What is the significance of initializing direction arrays below with given values when developing ch
...nd bottom right is 4,4 and shown what move each index of the arrays will make from the central point, X, at 2,2.)
.....
.536.
.1X0.
.724.
.....
The way it is set up, if you do ^1 (^ being bitwise XOR) on the index you get the opposite direction - 0 and 1 are opposites, 2 and 3 are opposites and s...
When is “Try” supposed to be used in C# method names?
We were discussing with our coworkers on what it means if the method name starts with "Try".
6 Answers
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PHP array_filter with arguments
... is that you create an object with the desired state ($num) and the callback method (taking $i as an argument):
class LowerThanFilter {
private $num;
function __construct($num) {
$this->num = $num;
}
function isLower($i) {
return ...