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Java reflection - impact of setAccessible(true)
...ses. Since I want to do this regardless of whether it's public, protected, or private, I am a calling setAccessible(true) on the Field object every time before calling the set() method. My question is what kind of impact does the setAccessible() call have on the field itself?
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How to set environment variable for everyone under my linux system?
Can I have certain settings that are universal for all my users?
7 Answers
7
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How to set the margin or padding as percentage of height of parent container?
...use something like top:50% (remember position matters if it still doesn't work)
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Keystore type: which one to use?
By looking at the file java.security of my JRE , I see that the keystore type to use by default is set to JKS . Here , there is a list of the keystore types that can be used.
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How to make JavaScript execute after page load?
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These solutions will work:
<body onload="script();">
or
document.onload = function ...
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 do I check if a variable exists?
... If the variable name is not known when the code is written, it will be stored in a string variable at runtime, and the check I posted will also work.
– Ayman Hourieh
May 9 '09 at 13:46
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Upgrade Node.js to the latest version on Mac OS
.... But after downloading and installing the latest package file from nodejs.org, I found that system is still using v0.6.16 instead of v0.8.1 when I typed "node -v" in a terminal. Is there any step that I have missed? Or, should I thoroughly uninstall the old version before installing the latest one?...
Iterate through every file in one directory
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As others have said, Dir::foreach is a good option here. However, note that Dir::foreach and Dir::entries will always include . and .. (the current and parent directories). You will generally not want to work on them, so you can use Dir::each_child or ...
How to delete migration files in Rails 3
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I usually:
Perform a rake db:migrate VERSION=XXX on all environments, to the version before the one I want to delete.
Delete the migration file manually.
If there are pending migrations (i.e., the migration I removed was not the last one), ...
jQuery document.ready vs self calling anonymous function
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$(document).ready(function(){ ... }); or short $(function(){...});
This Function is called when the DOM is ready which means, you can start to query elements for instance. .ready() will use different ways on different browsers to make sure that the DOM really IS...