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AES vs Blowfish for file encryption
...d AES. My next choices would probably be Serpent, MARS and Twofish in that order. Blowfish would come somewhere after those (though there are a couple of others that I'd probably recommend ahead of Blowfish).
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Converting String to Int with Swift
The application basically calculates acceleration by inputting Initial and final velocity and time and then use a formula to calculate acceleration. However, since the values in the text boxes are string, I am unable to convert them to integers.
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How do I trim a file extension from a String in Java?
... at the FilenameUtils.removeExtension method of the Apache Commons IO.
In order to recreate its behavior, I wrote a few tests the new method should fulfill, which are the following:
Path Filename
-------------- --------
a/b/c c
a/b/c.jpg c
a/b/c...
How to save a dictionary to a file?
... convenient, but is good for performance. Protocol 0 is a text format.
In order to save collections of Python there is the shelve module.
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Why should you use an ORM? [closed]
...sily formed in declarative constraints. E.g. "customer gets 10% off entire order the first time they buy more than three pairs of slacks from the same brand." How would you put that business rule into the database (keep in mind an answer involving stored procedures is clunky).
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Interface vs Base class
... mixin interface that
allows a class to declare that its
instances are ordered with respect to
other mutually comparable objects.
Interfaces allow the construction of nonhierarchical type
frameworks. Type hierarchies are
great for organizing some things, but
other things don’t fall n...
Please explain the exec() function and its family
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Simplistically, in UNIX, you have the concept of processes and programs. A process is an environment in which a program executes.
The simple idea behind the UNIX "execution model" is that there are two operations you can do.
The first ...
How do I download a tarball from GitHub using cURL?
I am trying to download a tarball from GitHub using cURL , but it does not seem to be redirecting:
5 Answers
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What is the difference between user variables and system variables?
...nment variables are 'evaluated' (ie. they are attributed) in the
following order:
System variables
Variables defined in autoexec.bat
User variables
Every process has an environment block that contains a set of environment variables and their values. There are two types of environment variables: ...
E11000 duplicate key error index in mongodb mongoose
... null value.
In other words, a sparse index is ok with multiple documents all having null values.
sparse indexes
From comments:
Your error says that the key is named mydb.users.$email_1 which makes me suspect that you have an index on both users.email and users.local.email (The former being old an...