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Understanding Python's “is” operator
... a is int which is an immutable object. So python (I guess to save memory) allocated the same object to b when it was created with the same value. So in this case, the identities of the variables matched and a is b turned out to be True.
This will apply for all immutable objects:
>>> del ...
Adjust width of input field to its input
...my code and it is not working. Is there any other way in HTML, JavaScript, PHP or CSS to set minimum width?
26 Answers
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What is the _snowman param in Ruby on Rails 3 forms for?
...characters). As a result, it's extremely common for Ruby applications (and PHP applications, etc. etc.) to exhibit this user-facing bug, and therefore extremely common for users to try to change the encoding as a palliative measure.
All that said, when I wrote this patch, I didn't realize that the ...
Add spaces before Capital Letters
...
@PandaWood you could but it would require another memory allocation and string copy. That said if performance is a worry a Regex is probably not the best way to go anyhow.
– Martin Brown
Nov 22 '14 at 9:02
...
MySQL Like multiple values
...GEXP 'sports|pub'
Found this solution here: http://forums.mysql.com/read.php?10,392332,392950#msg-392950
More about REGEXP here: http://www.tutorialspoint.com/mysql/mysql-regexps.htm
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impr...
Functional, Declarative, and Imperative Programming [closed]
...perative IO monad (note: not all monads are imperative!) implicit in space allocation, and timing is state relative to the imperative real world. Using lazy even with optional eager coproducts leaks "laziness" into inner coproducts, because with lazy the laziness incorrectness originates from the ou...
querySelector and querySelectorAll vs getElementsByClassName and getElementById in JavaScript
...Selector takes more time than getElementById, like here dimlucas.com/index.php/2016/09/17/… . What if we take access time into account? Does the live node obtained from getElementById take more time than the static one from querySelector?
– Eric
Nov 16 '17 at...
Proper use of beginBackgroundTaskWithExpirationHandler
...ceToken;
dispatch_once(&onceToken, ^{
sharedTasks = [[self alloc] init];
});
return sharedTasks;
}
- (id)init
{
self = [super init];
if (self) {
[self setTaskKeyCounter:0];
[self setDictTaskIdentifiers:[NSMutableDictionary dictionary]];
[self...
What is the difference between JSF, Servlet and JSP?
....
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Which version of MVC am I using?
...an MVC3 as you see. Via web you can use MvcDiagnostics which is similar to phpinfo() functionality in PHP.
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