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Change from SQLite to PostgreSQL in a fresh Rails project
I have a rails app that's databases are in SQLite (The dev and production). Since I am moving to heroku, I want to convert my database to PostgreSQL.
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How to deal with “data of class uneval” error from ggplot2?
...w.com%2fquestions%2f16486819%2fhow-to-deal-with-data-of-class-uneval-error-from-ggplot2%23new-answer', 'question_page');
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API to automatically upload apk to Google Play? [closed]
...ny channel (ie. alpha, beta...) or update title and description and more.
From the docs:
Uploading new versions of an app Releasing apps, by assigning APKs to various Tracks (alpha, beta, staged rollout, or production)
Creating and modifying Google Play Store listings, including
localiz...
Most efficient method to groupby on an array of objects
...efficient, as find() is probably O(n). The solution in the answer is O(n), from the reduce (object assignment is O(1), as is push), whereas the comment is O(n)*O(n) or O(n^2) or at least O(nlgn)
– narthur157
Jul 11 '18 at 10:47
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How can I get the button that caused the submit from the form submit event?
I'm trying to find the value of the submit button that triggered the form to submit
16 Answers
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I keep getting “Uncaught SyntaxError: Unexpected token o”
...onse header is application/json it is already parsed for you.
Parsed data from jquery success handler for text/html response:
var parsed = JSON.parse(data);
Parsed data from jquery success handler for application/json response:
var parsed = data;
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What does the @ symbol represent in objective-c?
...jects more efficient. (They become part of the method signature available from the runtime, which DO can look at to determine how to best serialize a transaction.) There are also the attributes within @property declarations, copy, retain, assign, readonly, readwrite, nonatomic, getter, and setter;...
Why would one use nested classes in C++?
... Node as other people may decide to use the class and that would hinder me from updating my class as anything exposed is part of the public API and must be maintained forever. By making the class private, I not only hide the implementation I am also saying this is mine and I may change it at any tim...
How to remove array element in mongodb?
... will find document with the given _id and remove the phone +1786543589455 from its contact.phone array.
You can use $unset to unset the value in the array (set it to null), but not to remove it completely.
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Docker: adding a file from a parent directory
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You can build the Dockerfile from the parent directory:
docker build -t <some tag> -f <dir/dir/Dockerfile> .
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