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Testing modules in rspec

...ting modules in rspec? I have some modules that get included in few models and for now I simply have duplicate tests for each model (with few differences). Is there a way to DRY it up? ...
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Delete rows from a pandas DataFrame based on a conditional expression involving len(string) giving K

I have a pandas DataFrame and I want to delete rows from it where the length of the string in a particular column is greater than 2. ...
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What is the $$hashKey added to my JSON.stringify result

...g on the Mozilla JSON stringify page of their docs as well as here on SO and Google but found no explanation. I have used JSOn stringify many time but never come across this result ...
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How can we access context of an application in Robolectric?

... Update. Just use for version 1.x and 2.x: Robolectric.application; And for version 3.x: RuntimeEnvironment.application; And for version 4.x: add to your build.gradle file: testImplementation 'androidx.test:core:1.0.0' retrieve the context with: Ap...
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Can anyone explain IEnumerable and IEnumerator to me? [closed]

Can anyone explain IEnumerable and IEnumerator to me? 16 Answers 16 ...
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How can I define colors as variables in CSS?

...te long. I know that the client could ask for changes to the color scheme, and was wondering: is it possible to assign colors to variables, so that I can just change a variable to have the new color applied to all elements that use it? ...
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Url.Action parameters?

... Then add the keys manually, HttpValueCollection do the encoding for you. And then just append the QueryString manually : var qs = HttpUtility.ParseQueryString(""); qs.Add("name", "John") qs.Add("contact", "calgary"); qs.Add("contact", "vancouver") <a href="<%: Url.Action("GetByList", "Lis...
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How to hide one item in an Android Spinner

I am looking for a way to hide one item in an Android spinner widget. This would allow you to simulate a spinner with no items selected, and ensures that the onItemSelected() callback is always called for every item selected (if the hidden item is the "current" one). Normally there is always one ite...
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Concatenate text files with Windows command line, dropping leading lines

I need to concatenate some relatively large text files, and would prefer to do this via the command line. Unfortunately I only have Windows, and cannot install new software. ...
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Microsoft Web API: How do you do a Server.MapPath?

...th("~/SomePath"); See also What is the difference between Server.MapPath and HostingEnvironment.MapPath? share | improve this answer | follow | ...