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How do you know when to use fold-left and when to use fold-right?
I'm aware that fold-left produces left-leaning trees and fold-right produces right-leaning trees, but when I reach for a fold, I sometimes find myself getting bogged down in headache-inducing thought trying to determine which kind of fold is appropriate. I usually end up unwinding the entire proble...
Elastic search, multiple indexes vs one index and types for different data sets?
I have an application developed using the MVC pattern and I would like to index now multiple models of it, this means each model has a different data structure.
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How to do an instanceof check with Scala(Test)
I'm trying to incorporate ScalaTest into my Java project; replacing all JUnit tests with ScalaTests. At one point, I want to check if Guice's Injector injects the correct type. In Java, I have a test like this:
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how to ignore namespaces with XPath
My goal is to extract certain nodes from multiple xml files with multiple namespaces using XPath. Everything works fine as long as i know the namespace URIs. The namespace name itself remains constant, but the Schemas (XSD) are sometimes client-generated i.e. unknown to me. Then i am left with basic...
Explain which gitignore rule is ignoring my file
Is there any way to see why some file is getting ignored by git (i.e. which rule in a .gitignore file is causing the file to be ignored)?
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The Concept of 'Hold space' and 'Pattern space' in sed
I'm confused by the two concepts in sed: hold space and pattern space. Can someone help explain them?
3 Answers
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How to navigate through a vector using iterators? (C++)
The goal is to access the "nth" element of a vector of strings instead of the [] operator or the "at" method. From what I understand, iterators can be used to navigate through containers, but I've never used iterators before, and what I'm reading is confusing.
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How can I get a Bootstrap column to span multiple rows?
I'm trying to figure out how to do the following grid with Bootstrap.
5 Answers
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RegEx to parse or validate Base64 data
...ossible to use a RegEx to validate, or sanitize Base64 data? That's the simple question, but the factors that drive this question are what make it difficult.
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Cannot make a static reference to the non-static method
Building a multi-language application in Java. Getting an error when inserting String value from R.string resource XML file:
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