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Why doesn't a python dict.update() return the object?
...atically tinged flavor of command-query separation: mutators return None (with pragmatically induced exceptions such as pop;-) so they can't possibly be confused with accessors (and in the same vein, assignment is not an expression, the statement-expression separation is there, and so forth).
That ...
Image fingerprint to compare similarity of many images
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Normal hashing or CRC calculation algorithms do not work well with image data. The dimensional nature of the information must be taken into account.
If you need extremely robust fingerprinting, such that affine transformations (scaling, rotation, translation, fli...
Error: could not find function … in R
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There are a few things you should check :
Did you write the name of your function correctly? Names are case sensitive.
Did you install the package that contains the function? install.packages("thePackage") (this only needs to be done once)
Did you attach that package to the wo...
Beginners Guide to Haskell? [closed]
...follow
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edited May 12 '16 at 12:02
Julian Leviston
1,53999 silver badges2121 bronze badges
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Maximum call stack size exceeded error
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It means that somewhere in your code, you are calling a function which in turn calls another function and so forth, until you hit the call stack limit.
This is almost always because of a recursive function with a base case th...
How to dynamically change header based on AngularJS partial view?
...ng-view to include AngularJS partial views, and I want to update the page title and h1 header tags based on the included view. These are out of scope of the partial view controllers though, and so I can't figure out how to bind them to data set in the controllers.
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Maven2 property that indicates the parent directory
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I've had success with ${project.basedir}/.. but that really only works in multi-module projects that are in a strict directory hierarchy.
– Jonathan
Feb 26 '13 at 15:44
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Why is it said that “HTTP is a stateless protocol”?
... That is the essence of "statelessness". Requests will not be associated with each other absent some shared info the server knows about, which in most cases is a session ID in a cookie.
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Pointer to pointer clarification
...ntains is a memory address. The & is the "address of" operator - i.e. it returns the address in memory of an object. The * operator gives you the object a pointer refers to, i.e. given a pointer containing an address, it returns the object at that memory address. So when you do *ipp = ip2, wh...
What is a “symbol” in Julia?
... to use Julia's DataFrames package, specifically the readtable() function with the names option, but that requires a vector of symbols.
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