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Why is auto_ptr being deprecated?
... closest thing to one anyway) is unique_ptr. As far as the "problem" goes, it's pretty simple: auto_ptr transfers ownership when it's assigned. unique_ptr also transfers ownership, but thanks to codification of move semantics and the magic of rvalue references, it can do so considerably more natural...
Check whether a string is not null and not empty
...t get a null pointer exception from str.isEmpty() if str is null.
Beware, it's only available since Java SE 1.6. You have to check str.length() == 0 on previous versions.
To ignore whitespace as well:
if(str != null && !str.trim().isEmpty())
(since Java 11 str.trim().isEmpty() can be ...
Are trailing commas in arrays and objects part of the spec?
...ECMAScript 3
Section 11.1.5 in the ECMAScript 5 specification:
ObjectLiteral :
{ }
{ PropertyNameAndValueList }
{ PropertyNameAndValueList , }
So yes, it is part of the specification.
Update: Apparently this is new in ES5. In ES3 (page 41), the definition was just:
ObjectLitera...
How do I prevent the modification of a private field in a class?
...
but do make sure it's a deep copy, not a shallow copy, of the data. For Strings it makes no difference, for other classes like Date where the content of the instance can be modified it can make a difference.
– jwenting
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How do I call some blocking method with a timeout in Java?
Is there a standard nice way to call a blocking method with a timeout in Java? I want to be able to do:
10 Answers
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How to remove non-alphanumeric characters?
... like you almost knew what you wanted to do already, you basically defined it as a regex.
preg_replace("/[^A-Za-z0-9 ]/", '', $string);
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Popstate on page's load in Chrome
...d use history.pushState() in order to update the browser's location bar without page reload. Then, of course, I use window.popstate in order to restore previous state when back-button is clicked.
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ipad safari: disable scrolling, and bounce effect?
...pdate September 2014:
A more thorough approach can be found here: https://github.com/luster-io/prevent-overscroll. For that and a whole lot of useful webapp advice, see http://www.luster.io/blog/9-29-14-mobile-web-checklist.html
Update March 2016: That last link is no longer active - see https://we...
How to place the ~/.composer/vendor/bin directory in your PATH?
...ethod in the quickstart documentation, that is, via Laravel Installer, but it says to "Make sure to place the ~/.composer/vendor/bin directory in your PATH so the Laravel executable is found when you run the Laravel command in your terminal." so my question is, how do I do that? This may be a si...
Android studio logcat nothing to show
...thing to show in the logcat. I used the terminal to run ./adb logcat and it works.
60 Answers
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