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PHP Regex to check date is in YYYY-MM-DD format
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Try this.
$date="2012-09-12";
if (preg_match("/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])$/",$date)) {
return true;
} else {
return false;
}
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How do I show multiple recaptchas on a single page?
I have 2 forms on a single page. One of the forms has a recaptcha displaying all the time. The other should display a recaptcha only after a certain event such as maxing out login attempts. So there are times when I would need 2 recaptchas to appear on the same page. Is this possible? I know I ...
JavaScript hashmap equivalent
As made clear in update 3 on this answer , this notation:
17 Answers
17
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How to debug Angular JavaScript Code
...arang.
(From recent reviews on the plugin it seems like AngularJS Batarang is no longer being maintained. Tested in various versions of Chrome and it does not work.)
Here is the the link for a description and demo:
Introduction of Angular JS Batarang
Download Chrome plugin from here: Chrome plugin f...
Create empty file using python [duplicate]
...directory version of os.mkdir , but I haven't been able to find anything. Is there a tool like this to create a file without opening it, or using system or popen/subprocess?
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Android Fragment lifecycle over orientation changes
...rs the old Fragment adds itself to the new Activity when it's recreated. This is a massive pain in the rear most of the time.
You can stop errors occurring by using the same Fragment rather than recreating a new one. Simply add this code:
if (savedInstanceState == null) {
// only create fragme...
How to make JavaScript execute after page load?
...on ...
or even
window.onload = function ...
Note that the last option is a better way to go since it is unobstrusive and is considered more standard.
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How to use concerns in Rails 4
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So I found it out by myself. It is actually a pretty simple but powerful concept. It has to do with code reuse as in the example below. Basically, the idea is to extract common and / or context specific chunks of code in order to clean up the models and avo...
Why should I prefer single 'await Task.WhenAll' over multiple awaits?
... should I still use await Task.WhenAll instead of multiple await ? e.g, is DoWork2 below a preferred method to DoWork1 (and why?):
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is there a Java equivalent to null coalescing operator (??) in C#? [duplicate]
Is it possible to do something similar to the following code in Java
6 Answers
6
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