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How does Go compile so quickly?
...here every single file starts including x headers, which include y headers etc. Bottom line: Go's compiling takes linear time w.r.t to the number of imported packages, where C/C++ take exponential time.
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Git: How to remove file from historical commit?
...ociated with them. This means that stuff like signed commits, commit notes etc. are preserved
filter-branch keeps backups too, so the size of the repo won't decrease immediately unless you expire the reflogs and garbage collect:
rm -Rf .git/refs/original # careful
git gc --aggressive --prun...
Difference between except: and except Exception as e: in Python
... you can use the infomration in the exception (type, message, stack trace, etc) to handle the exception in a more specially tailored manor.
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How do I execute inserts and updates in an Alembic upgrade script?
...al models directly will cause problems with missing columns, invalid data, etc. It's clearer to explicitly state exactly what columns and models you will use in the migration.
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Is there a way to check if a file is in use?
...e function below, for example
TimeoutFileAction(() => { System.IO.File.etc...; return null; } );
Reusable method that times out after 2 seconds
private T TimeoutFileAction<T>(Func<T> func)
{
var started = DateTime.UtcNow;
while ((DateTime.UtcNow - started).TotalMillisecond...
Difference between a Seq and a List in Scala
...ns.unmodifiableList() and similarly there are other methods for Sets, Maps etc. docs.oracle.com/javase/6/docs/api/java/util/…
– jbx
Nov 14 '13 at 16:16
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Why do we need tuples in Python (or any immutable data type)?
... You could then hang other mutable data on the class--"user is logged in", etc. Since this doesn't affect equality or the hash, it's possible and perfectly valid to use this as a key in a dictionary. This isn't too commonly needed in Python; I just point it out since several people have claimed th...
setuptools: package data folder location
...ike include a 'src' subdir inside my package dir without breaking imports, etc
– Jonathan Hartley
Mar 25 '11 at 9:43
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Differences between dependencyManagement and dependencies in Maven
...ment does is simply move your dependency definitions (version, exclusions, etc) up to the parent pom, then in the child poms you just have to put the groupId and artifactId. That's it (except for parent pom chaining and the like, but that's not really complicated either - dependencyManagement wins o...
What is the best way to create constants in Objective-C
...stants. Things like serial identifier numbers, bit-masks, four-byte codes, etc.
For those purposes, enum is great and you absolutely should use it. (Even better, use the NS_ENUM and NS_OPTIONS macros.) For other things, you must use something else; enum does not do anything but integers.
And other...