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Ioc/DI - Why do I have to reference all layers/assemblies in application's entry point?
...- for example in unit testing.
However, in a loosely coupled application, by moving all the references to the Composition Root, the dependency graph is severely flattened:
As illustrated by the green color, it's now possible to reuse Library C without dragging along any unwanted dependencies.
H...
Rename specific column(s) in pandas
...ng a dictionary and perform the list-comprehension with it's get operation by setting default value as the old name:
col_dict = {'gdp': 'log(gdp)', 'cap': 'cap_mod'} ## key→old name, value→new name
df.columns = [col_dict.get(x, x) for x in df.columns]
Timings:
%%timeit
df.rename(columns={...
Why do we need Abstract factory design pattern?
...of the factory pattern?
DDD Book, Eric Evans: Please explain what is meant by "The FACTORY should be abstracted to the type desired rather than the concrete class(es) created."
DI container, factory, or new for ephemeral objects?
How to unit test instance creation?
What is the best strategy for Depe...
How to disable anchor “jump” when loading a page?
... best as I can.
I have a page containing tabs (jquery powered), controlled by the following:
16 Answers
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RE error: illegal byte sequence on Mac OS X
...that exhibits the symptom: sed 's/./@/' <<<$'\xfc' fails, because byte 0xfc is not a valid UTF-8 char.
Note that, by contrast, GNU sed (Linux, but also installable on macOS) simply passes the invalid byte through, without reporting an error.
Using the formerly accepted answer is an option ...
What it the significance of the Javascript constructor property?
Trying to bend by head around Javascript's take on OO...and, like many others, running into confusion about the constructor property. In particular, the significance of the constructor property, as I can't seem to make it have any effect. E.g.:
...
What's the difference between git reflog and log?
...ent, its parent, and so on. It traverses back through the repo's ancestry, by recursively looking up each commit's parent.
(In practice, some commits have more than one parent. To see a more representative log, use a command like git log --oneline --graph --decorate.)
git reflog doesn't traverse H...
What is included in JCenter repository in Gradle?
...ter is the place to find and share popular Apache Maven packages
for use by Maven, Gradle, Ivy, SBT, etc. For the most comprehensive
collection of artifacts, point your Maven at:
http://jcenter.bintray.com Want to distribute your own packages
through JCenter? You can link your package by cli...
What is the significance of load factor in HashMap?
...the initial capacity is greater than the maximum number of entries divided by the load factor, no rehash operations will ever occur.
As with all performance optimizations, it is a good idea to avoid optimizing things prematurely (i.e. without hard data on where the bottlenecks are).
...
Get name of caller function in PHP?
...ur caller:
$trace = debug_backtrace();
$caller = $trace[1];
echo "Called by {$caller['function']}";
if (isset($caller['class']))
echo " in {$caller['class']}";
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