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Calculate date/time difference in java [duplicate]
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@vels4j I was assuming the third line from the original code which I have just added. Thank you for pointing that out.
– Peter Lawrey
Nov 3 '18 at 11:43
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Python Dictionary Comprehension
...Note that if you to create a dictionary with all values the same, use dict.fromkeys(). So to set all values to True, use dict.fromkeys(range(5), True). Watch out, the value is not copied, so you may want to avoid this when you have a mutable value; it'll be shared between all keys.
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PHP Fatal error: Call to undefined function json_decode()
...json module installed. So I run cygwin setup.exe again, check json package from the configuration interface, and the problem is solved.
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Positioning element at center of screen
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If you have a fixed div just absolute position it at 50% from the top and 50% left and negative margin top and left of half the height and width respectively. Adjust to your needs:
div {
position: absolute;
top: 50%;
left: 50%;
width: 500px;
height: 300px;
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How can I disable logging of asset pipeline (sprockets) messages in Ruby on Rails 3.1?
...A proper Rack middleware solution (instead of fragile alias_method_chain) from @macournoyer https://github.com/rails/rails/issues/2639#issuecomment-6591735
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How do I serialize a C# anonymous type to a JSON string?
... Customer { Name="Joe Bloggs", Age=31 };
var json = customer.ToJson();
var fromJson = json.FromJson<Customer>();
Note: Only use Microsofts JavaScriptSerializer if performance is not important to you as I've had to leave it out of my benchmarks since its up to 40x-100x slower than the other ...
How to var_dump variables in twig templates?
...uldn't have to set twig: debug: 1 because it's inheriting this information from your front controller's environment. Otherwise you could end up in uninentionally outputting debug information in your prod environment. As long as you are working in the dev environment it is enabled by default and it's...
HTML5 check if audio is playing?
...t; 2;
}
I think most of the flags on the audio element are obvious apart from the ready state which you can read about here: MDN HTMLMediaElement.readyState.
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Remove a cookie
... This is because client computers can and often do have times which differ from that of your server.
The best practice is to overwrite the current cookie with a blank cookie which expires one second in the future after the epoch (1 January 1970 00:00:00 UTC), as so:
setcookie("hello", "", 1);
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How to get the last char of a string in PHP?
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From PHP 7.1 you can do this (Accepted rfc for negative string offsets):
<?php
$silly = 'Mary had a little lamb';
echo $silly[-20];
echo $silly{-6};
echo $silly[-3];
echo $silly[-15];
echo $silly[-13];
echo $silly[-1];
ec...