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How can I check for an empty/undefined/null string in JavaScript?
... tools, testing === '' vs .length didn't show any discernible improvement (and using .length only works if you can assume that you have a string)
– bdukes
Sep 27 '10 at 13:19
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How do I register a DLL file on Windows 7 64-bit?
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Type regsvr32 name.dll into the Command Prompt (executed in elevated mode!) and press "Enter." Note that name.dll should be replaced with the name of the DLL that you want to register. For example, if you want to register the iexplore.dll, type regsvr32 iexplor...
Best dynamic JavaScript/JQuery Grid [closed]
I'm working with JavaScript, JQuery and HTML. UI Of my project is completely dynamic. I am looking for a dynamic JavaScript/JQuery Grid which supports following features.
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Java - JPA - @Version annotation
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On update, the field annotated with @Version will be incremented and added to the WHERE clause, something like this:
UPDATE MYENTITY SET ..., VERSION = VERSION + 1 WHERE ((ID = ?) AND (VERSION = ?))
If the WHERE clause fails to match a record (because the same entity has already been up...
Git - deleted some files locally, how do I get them from a remote repository
...e HEAD~n, or simply fire up gitk, find the SHA1 of the appropriate commit, and paste it in.
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Detect if homebrew package is installed
...rew packages are installed in the system. Is there a way to use a brew command to achieve that?
4 Answers
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can't push to branch after rebase
We use git and have a master branch and developer branches. I need to add a new feature and then rebase the commits to master, then push master to CI server.
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How do I create a class instance from a string name in ruby?
I have the name of a class and I want to create an instance of that class so that I can loop through each rails attribute that is present in the schema of that class.
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Openstreetmap: embedding map in webpage (like Google Maps)
...an example at http://wiki.openstreetmap.org/wiki/OpenLayers_Simple_Example and something more advanced at
http://wiki.openstreetmap.org/wiki/OpenLayers_Marker
and
http://wiki.openstreetmap.org/wiki/Openlayers_POI_layer_example
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Why does the arrow (->) operator in C exist?
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I'll interpret your question as two questions: 1) why -> even exists, and 2) why . does not automatically dereference the pointer. Answers to both questions have historical roots.
Why does -> even exist?
In one of the very first versions of C language (which I will refer as CRM for "C Refe...