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Why does Oracle 9i treat an empty string as NULL?

...r exists but is not known by the user, data where there is no answer, etc. all of which constitute some sense of NULL). By the time that the SQL standard came around and agreed that NULL and the empty string were distinct entities, there were already Oracle users that had code that assumed the two ...
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Collections.emptyList() vs. new instance

...ntly. In addition, emptyList() might not create a new object with each call. Implementations of this method need not create a separate List object for each call. Using this method is likely to have comparable cost to using the like-named field. (Unlike this method, the field does not provide ...
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More elegant “ps aux | grep -v grep”

... brilliant hack (I think I should call it that, since the aux / grep authors probably did not think of this scenario.) – Michael Trouw Apr 12 '16 at 14:12 ...
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Path of assets in CSS files in Symfony 2

...ge in /web/bundles/mynicebundle/images/devil.png I have made a test with ALL possible (sane) combinations of the following: @notation, relative notation Parse with cssrewrite, without it CSS image background vs direct <img> tag src= to the very same image than CSS CSS parsed with assetic a...
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ASP.NET MVC passing an ID in an ActionLink to the controller

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Overriding class constants vs properties

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Setting transparent images background in IrfanView

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Random / noise functions for GLSL

As the GPU driver vendors don't usually bother to implement noiseX in GLSL, I'm looking for a "graphics randomization swiss army knife" utility function set, preferably optimised to use within GPU shaders. I prefer GLSL, but code any language will do for me, I'm ok with translating it on my own ...
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Remove specific commit

...hanged line 2" 1 files changed, 1 insertions(+), 1 deletions(-) Then it all works as expected. The second answer was very interesting. There is a feature which has not yet been officially released (though it is available in Git v1.7.2-rc2) called Revert Strategy. You can invoke git like this: ...
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Equivalent of *Nix 'which' command in PowerShell?

... Is there any way to have the path all the time without to type '| Format-Table Path, Name' ? – Guillaume Jan 11 '13 at 8:18 11 ...