idioms

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Getting compile errors with Copliens 1994 counted pointer example code

OK, I am reading Copliens C++ Idioms book, and trying to run the handle/body examples in the book. After typing in the code, I am getting compile errors:[详细]

2023-03-18 07:10 分类：问答
Java idiom to define a call patttern matching a CFG

Assume a trivial XML-like document format with two terminal elementsandand one recursively nestable element .... Assume the objective is to construct strings using the Java type system to allow new (s[详细]

2023-03-18 03:02 分类：问答
Why implicitly check for emptiness in Python? [closed]

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references,or expertise, but this question will likely solicit debate, a[详细]

2023-03-15 05:00 分类：问答
help on writing "the colist Monad" (Exercise from an Idioms intro paper)

I\'m reading Conor McBride and Ross Paterson\'s \"Functional Pearl / Idioms: applicative programming with effects:\" (The new version, with \"idioms\" in the title). I\'m having a little difficulty wi[详细]

2023-03-14 21:52 分类：问答
Pythonic way to extract values from this text file

I have an output file from a legacy piece of software which is shown below. I want to extract values from it, so that, for example, I can set a variable called direct_solar_irradiance to 648.957, and[详细]

2023-03-14 00:02 分类：问答
Ruby "return unless nil" idiom

I\'ve got a smelly method like: def search_record(*args) record = expensive_operation_1(foo) return record unless record.nil?[详细]

2023-03-13 05:56 分类：问答
Programming language idiom for "if object.value == some_value then object.value = some_other_value"

I\'ve been wondering myself multiple times if, and if not, why not, there is an idiom/shortcut for the following pseudocode:[详细]

2023-03-12 14:43 分类：问答
How do I return a clojure map with fixed keys and conditional values?

I have a function that returns a map. The keys are static, but the values are conditional. Like this:[详细]

2023-03-11 08:50 分类：问答
Standard idiom for walking along a list in C

I am reading \"The practice of programming\" and it says that a standard loop for walking along a list in C is:[详细]

2023-03-08 19:03 分类：问答
PHP - best way to initialize an object with a large number of parameters and default values

I\'m designing a class that defines a highly complex object with a ton (50+) of mostly optional parameters, many of which would have defaults (eg: $type = \'foo\'; $width = \'300\'; $interactive = fal[详细]

2023-03-05 16:44 分类：问答