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What's the “big idea” behind compojure routes?
I'm new to Clojure and have been using Compojure to write a basic web application. I'm hitting a wall with Compojure's defroutes syntax, though, and I think I need to understand both the "how" and the "why" behind it all.
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How to explain Katana and OWIN in simple words and uses?
I have read many articles about the OWIN and Katana projects, but I could not get the whole picture of it.
4 Answers
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Create ArrayList from array
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Yep. And in the (most common) case where you just want a list, the new ArrayList call is unecessary as well.
– Calum
Oct 1 '08 at 14:41
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How can I open the interactive matplotlib window in IPython notebook?
I am using IPython with --pylab=inline and would sometimes like to quickly switch to the interactive, zoomable matplotlib GUI for viewing plots (the one that pops up when you plot something in a terminal Python console). How could I do that? Preferably without leaving or restarting my notebook.
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“PKIX path building failed” and “unable to find valid certification path to requested target”
...got an error about certificate sun.security.validator.ValidatorException and sun.security.provider.certpath.SunCertPathBuilderException . Then I added twitter certificate by:
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When do you use the Bridge Pattern? How is it different from Adapter pattern?
...ttern Wikipedia entry). The Bridge pattern is a composite of the Template and Strategy patterns.
It is a common view some aspects of the Adapter pattern in the Bridge pattern. However, to quote from this article:
At first sight, the Bridge pattern looks a lot like the Adapter pattern in that ...
How to replace plain URLs with links?
I am using the function below to match URLs inside a given text and replace them for HTML links. The regular expression is working great, but currently I am only replacing the first match.
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Determine if a function exists in bash
...t tests which are executed from bash. Unit tests are initialized, executed and cleaned up in a bash script. This script usualy contains an init(), execute() and cleanup() functions. But they are not mandatory. I'd like to test if they are or are not defined.
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Simple Pivot Table to Count Unique Values
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Insert a 3rd column and in Cell C2 paste this formula
=IF(SUMPRODUCT(($A$2:$A2=A2)*($B$2:$B2=B2))>1,0,1)
and copy it down. Now create your pivot based on 1st and 3rd column. See snapshot
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Difference between VARCHAR and TEXT in MySQL [duplicate]
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VARCHAR(M)
variable max size of M characters
M needs to be between 1 and 65535
takes 1 + c bytes (for M ≤ 255) or 2 + c (for 256 ≤ M ≤ 65535) bytes of disk space where c is the length of the stored string
can be part of an index
More Details
TEXT has a fixed max size of 2¹⁶-1 = 655...