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What is an “unwrapped value” in Swift?
...e bang operator when the value is nil your application will crash.
And in order to use these variables at all in some sort or mathematical operation they must be unwrapped in order to do so.
For instance, in Swift only valid number data types of the same kind may be operated on each other. When yo...
Most Pythonic way to provide global configuration variables in config.py? [closed]
...",
"tables": {
"users": "tb_users"
}
# etc
}
}
You'd access the values as follows:
config["mysql"]["tables"]["users"]
If you are willing to sacrifice the potential to compute expressions inside your config tree, you could use YAML and end up with a more...
HTTP GET Request in Node.js Express
...ple, instead of concatenating the chunks you put into an array and join it etc... Hopefully, it gets you started in the right direction:
const http = require('http');
const https = require('https');
/**
* getJSON: RESTful GET request returning JSON object(s)
* @param options: http options objec...
Read entire file in Scala?
...e to the party, but I'd hate for people not to know they can do "io.File("/etc/passwd").slurp" in trunk.
– psp
Aug 26 '09 at 3:48
28
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pip install mysql-python fails with EnvironmentError: mysql_config not found
...e path, but I think you're better off adding it permanently (ie add it to /etc/paths) if you plan to install MySQL-python in another environment.
(tested in OSX Mountain Lion)
share
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improve this ...
Get list from pandas DataFrame column headers
...
Importantly, this preserves the column order.
– WindChimes
Jan 25 '16 at 13:07
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Is the LIKE operator case-sensitive with MSSQL Server?
...
You have an option to define collation order at the time of defining your table. If you define a case-sensitive order, your LIKE operator will behave in a case-sensitive way; if you define a case-insensitive collation order, the LIKE operator will ignore character...
HashSet vs. List performance
... Even if you say your List<T> wouldn't have duplicates and iteration order doesn't matter making it comparable to a HashSet<T>, its still a poor choice to use List<T> because its relatively less fault tolerant.
That said, I will inspect some other aspects of performance,
+-----...
How to add external library in IntelliJ IDEA?
...have a smaller
screen like me, you may have to drag resize to the right in order to
see it)
From the dropdown of Add options, choose "Library". A "Choose
Libraries" dialog will appear.
Press "New Library..."
Choose a suitable title for the library
Press "Attach Classes..."
Choose the Jar from your l...
Relational Database Design Patterns? [closed]
...versally applicable data models (employees, accounts, shipping, purchases, etc), Volume 2 contains industry specific data models (accounting, healthcare, etc), Volume 3 provides data model patterns.
Finally, while this book is ostensibly about UML and Object Modelling, Peter Coad's Modeling in Colo...