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Reminder - \r\n or \n\r?
...Mac keyboards, or else you might later look at a PC keyboard, see the key called "Enter," and get the letter order wrong!
– Rob Kennedy
Jun 30 '11 at 19:36
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What does ** (double star/asterisk) and * (star/asterisk) do for parameters?
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The *args and **kwargs is a common idiom to allow arbitrary number of arguments to functions as described in the section more on defining functions in the Python documentation.
The *args will give you all function parameters as a tuple:
def foo(*args):
for a in a...
Do the JSON keys have to be surrounded by quotes?
...ion on (unquoted) reserved keywords as keys, so they just required quoting all keys.
– BallpointBen
Aug 21 '18 at 23:01
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Difference between View and table in sql
...tical queries on it.
Instead of sending the complex query to the database all the time, you can save the query as a view and then SELECT * FROM view
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How do you prevent install of “devDependencies” NPM modules for Node.js (package.json)?
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The npm install command will install the devDependencies along other dependencies when run inside a package directory, in a development environment (the default).
Use npm install --only=prod (or --only=production) to install only depend...
How to make a element expand or contract to its parent container?
...its parent container, in this case a <div> , no matter how big or small that container may be.
5 Answers
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JPA: unidirectional many-to-one and cascading delete
...e as ON DELETE CASCADE. You'll need to invoke EntityManager.clear() after calling EntityManager.remove(parent) as the persistence context needs to be refreshed - the child entities are not supposed to exist in the persistence context after they've been deleted in the database.
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Why doesn't Java allow overriding of static methods?
...One was a concern with performance: there had been a lot of criticism of Smalltalk about it being too slow (garbage collection and polymorphic calls being part of that) and Java's creators were determined to avoid that. Another was the decision that the target audience for Java was C++ developers. M...
Authorative way to override onMeasure()?
...velopment uses MeasureSpec to calculate the dimensions, then ends with a call to setMeasuredDimension(). For example:
8 An...
Why am I seeing an “origin is not allowed by Access-Control-Allow-Origin” error here? [duplicate]
...to use javascript. You make a request and results are encapsulated into a callback function which is run in the client. It's the same as linking a new script tag into the head part of your html (you know that you can load scripts from different domains than yours here).
However, to use jsonp the ser...