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how to check if object already exists in a list
... the list.exists is another solution see below, but if you have huge lists and key value with a dictionary will be much faster as it is a hash table! Enjoy
– Doug
Aug 8 '10 at 17:21
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Map implementation with duplicate keys
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You are searching for a multimap, and indeed both commons-collections and Guava have several implementations for that. Multimaps allow for multiple keys by maintaining a collection of values per key, i.e. you can put a single object into the map, but you retr...
Using R to download zipped data file, extract, and import data
... of online csvs are zipped. Is there a way to download, unzip the archive, and load the data to a data.frame using R? #Rstats"
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Best way to stress test a website [duplicate]
...ar pages? Or is the best thing to use a profiler to track a single request and then work out from that if the performance is ok?
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shortcut for creating a Map from a List in groovy?
I'd like some sorthand for this:
8 Answers
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Gradient borders
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WebKit now (and Chrome 12 at least) supports gradients as border image:
-webkit-border-image: -webkit-gradient(linear, left top, left bottom, from(#00abeb), to(#fff), color-stop(0.5, #fff), color-stop(0.5, #66cc00)) 21 30 30 21 repeat r...
Signtool error: No certificates were found that met all given criteria with a Windows Store App?
...g to sign a Windows 8 appx package with a pfx file I have. I'm using a command like so:
19 Answers
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Apache redirect to another port
I've struggled with this for some time and am definitely doing something wrong.
14 Answers
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How can I inspect disappearing element in a browser?
...element that contains the disappearing element. Right click on the element and apply "Break on... > Subtree Modifications." This will throw a debugger pause before the element disappears, which will allow you to interact with the element in a paused state.
Update Oct 22 2019: with the release of...
Javascript: best Singleton pattern [duplicate]
...nter-intuitive. shouldn't it be something like a = Singleton.getInstance() and then b= Singleton.getInstance()??
– Diego
Apr 8 '14 at 23:30
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