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How to get started on TDD with Ruby on Rails? [closed]

...the concepts (took testing classes in college), but I am not sure how to really use them yet since I never worked on a "real" TDD project. ...
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Get MIME type from filename extension

...dd double checks and provide fail safe action for every step. MimeMapping._mappingDictionary.AddMapping(string fileExtension, string mimeType) share | improve this answer | ...
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How to use WPF Background Worker

... private void worker_DoWork(object sender, DoWorkEventArgs e) { // run all background tasks here } private void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) { //update ui once worker complete his work } Run worker async...
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How to avoid reinstalling packages when building Docker image for Python projects?

...ase WORKDIR /srv ADD ./requirements.txt /srv/requirements.txt RUN pip install -r requirements.txt ADD . /srv RUN python setup.py install ENTRYPOINT ["run_server"] Docker will use cache during pip install as long as you do not make any changes to the requirements.txt, irrespective of the fact whet...
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C++ unordered_map using a custom class type as the key

...rrides operator(), or as a specialization of std::equal, or – easiest of all – by overloading operator==() for your key type (as you did already). The difficulty with the hash function is that if your key type consists of several members, you will usually have the hash function calculate hash ...
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For files in directory, only echo filename (no path)

...s Parameter Expansion which is native to the shell and does not require a call to an external binary such as basename However, might I suggest just using find find /home/user -type f -printf "%f\n" share | ...
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create a trusted self-signed SSL cert for localhost (for use with Express/Node)

...dejs/Express. None of them work properly because while the cert gets installed, it is not trusted. here's what I've tried that fails: ...
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Comparing Dates in Oracle SQL

...; to_date('31-DEC-95','DD-MON-YY') This method has a few unnecessary pitfalls As a_horse_with_no_name noted in the comments, DEC, doesn't necessarily mean December. It depends on your NLS_DATE_LANGUAGE and NLS_DATE_FORMAT settings. To ensure that your comparison with work in any locale you can u...
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MongoDB: How to update multiple documents with a single command?

...: 'field1', field2: 'field2'}) New in version 3.2 Params:: {}: select all records updated Keyword argument multi not taken share | improve this answer | follow ...
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Select 50 items from list at random to write to file

...opulation unchanged. The resulting list is in selection order so that all sub-slices will also be valid random samples. This allows raffle winners (the sample) to be partitioned into grand prize and second place winners (the subslices). Members of the population need not be hashab...