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Convert a python dict to a string and back
... @AJ00200: and the ast.literal_eval alternative I mentioned?. From the Python help: "Safely evaluate an expression node or a string containing a Python expression. The string or node provided may only consist of the following Python literal structures: strings, numbers, tuples, lists, d...
How can I export the schema of a database in PostgreSQL?
... pg_dump.exe. I don't have access to a Windows machine but I'm pretty sure from memory that's the command. See if the help works for you too.
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How to automatically convert strongly typed enum into int?
... That's another weird example of 'we know better what you want to do' from C++ creators. Conventional (old-style) enums had tons of benefits like implicit conversion to indexes, seamless using of bitwise operations etc.. The new style enums added a really great scoping thing, but... You cannot...
How to make an anchor tag refer to nothing?
...ssibility problem. You can resolve it by using a button element (generated from JavaScript so non-JS users don't get a broken control).
– Quentin
May 29 '09 at 8:13
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Scala: write string to file in one statement
...ccepts a java.lang.Iterable as the second argument, and we can obtain that from a Scala Iterable, i.e. pretty much any collection type, using a converter: import java.nio.file.{Files, Paths}; import scala.collection.JavaConverters.asJavaIterableConverter; val output = List("1", "2", "3"); Files.writ...
How do you determine the ideal buffer size when using FileInputStream?
I have a method that creates a MessageDigest (a hash) from a file, and I need to do this to a lot of files (>= 100,000). How big should I make the buffer used to read from the files to maximize performance?
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Why are quaternions used for rotations?
...ler angles use the least memory; matrices use more memory but don't suffer from Gimbal lock and have nice analytical properties; and quaternions strike a nice balance of both, being lightweight, but free from Gimbal lock.
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Rake just one migration
... To expand on what Ryan says, if the table has been dropped from the database outside of Rails, rake db:migrate:up VERSION=my_version may do nothing, because the schema_migrations table still says it is has been run. In the same situation rake db:migrate:redo VERSION=my_version may fa...
How can I access getSupportFragmentManager() in a fragment?
... fragManager = myContext.getSupportFragmentManager(); //If using fragments from support v4
or
FragmentManager fragManager = myContext.getFragmentManager();
You are done.
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Running Windows batch file commands asynchronously
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it prevents the command from being echoed to the console. In batch scripts, sometimes you'll see echo off at the beginning which, when you execute the script, will prevent all the commands from being echoed to the console. The @ is similar but just ...