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Multiprocessing - Pipe vs Queue
... as possible. These are the timing results of a drag race between similar tests using Pipe() and Queue()... This is on a ThinkpadT61 running Ubuntu 11.10, and Python 2.7.2.
FYI, I threw in results for JoinableQueue() as a bonus; JoinableQueue() accounts for tasks when queue.task_done() is called (...
Which is more preferable to use: lambda functions or nested functions ('def')?
... see that the lambda and defined versions are roughly equivalent. The last test took more time because python probably needed to allocate space every time it defined that lambda function.
– hlin117
Nov 21 '14 at 6:19
...
What GRANT USAGE ON SCHEMA exactly do?
... the schema that contains it then you can't access the table.
The rights tests are done in order:
Do you have `USAGE` on the schema?
No: Reject access.
Yes: Do you also have the appropriate rights on the table?
No: Reject access.
Yes: Check column privileges.
Your...
How to read a large file - line by line?
...t parallel programming is like. I gave away for free the harder parts: the tested and working parallel code, for your learning benefit.
Thanks to: The open-source H2O project, by Arno and Cliff and the H2O staff for their great software and instructional videos, which have provided me the inspirat...
How do I adjust the anchor point of a CALayer, when Auto Layout is being used?
...
By the way, here's a test rig I've been using. It would be great if someone figured this out: github.com/algal/AutolayoutAnchorPointTestRig
– algal
Nov 27 '12 at 12:16
...
Ignoring time zones altogether in Rails and PostgreSQL
... query is displayed for the current time zone setting Vienna/Austria in my test, which has an offset +1 during winter and +2 during summer time ("daylight saving time", DST). So 2012-03-05 18:00:00+01 as DST only kicks in later.
Postgres has already forgotten how this value has been entered. All it ...
Difference between
...from type C2.
Notes
Here the complete hierarchy if you wish to make some tests
interface A1{}
interface A2{}
interface A3{}
interface A4{}
interface B1 extends A1{}
interface B2 extends A1,A2{}
interface B3 extends A3,A4{}
interface B4 extends A4{}
interface C1 extends B2{}
interface C2 extends...
Is multiplication and division using shift operators in C actually faster?
... clearly (i.e. i*2 rather than i << 1) and let it decide what the fastest assembly/machine code sequence is. It's even possible that the processor itself has implemented the multiply instruction as a sequence of shifts & adds in microcode.
Bottom line--don't spend a lot of time worrying ...
How can I add reflection to a C++ application?
...ot supported by C++ out of the box. This is sad because it makes defensive testing a pain.
There are several approaches to doing reflection:
use the debug information (non portable).
Sprinkle your code with macro's/templates or some other source approach (looks ugly)
Modify a compiler such as clang...
What is the dependency inversion principle and why is it important?
...object will be indpendent of the implementation of the other objects. Unit testing is now simple. Later refactoring for reuse is possible. Design changes have very limited change scopes. Design problems don not cascade. See also the AI pattern "Blackboard" for data dependaecy inversion. Together, ve...