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Passing arguments to “make run”
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edited Mar 16 at 19:11
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How to understand nil vs. empty vs. blank in Ruby
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.nil? can be used on any object and is true if the object is nil.
.empty? can be used on strings, arrays and hashes and returns true if:
String length == 0
Array length == 0
Hash length == 0
Running .empty? on something that is nil will throw a NoMethodErr...
Difference between “!==” and “==!” [closed]
Yesterday I stumbled over this when I modified PHP code written by someone else. I was baffled that a simple comparison ( if ($var ==! " ") ) didn't work as expected. After some testing I realized that whoever wrote that code used ==! instead of !== as comparison operator. I've never seen ==! ...
Static method behavior in multi-threaded environment in java
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Hans Passant's answer is good. But I thought I would try and explain at a slightly more simple level for anybody who comes across this and is newish to Java. Here goes..
Memory in java is split up into two kinds - the heap and the stacks. The hea...
How to set a Django model field's default value to a function call / callable (e.g., a date relative
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The question is misguided. When creating a model field in Django, you are not defining a function, so function default values are irrelevant:
from datetime import datetime, timedelta
class MyModel(models.Model):
# default to 1 day fro...
What is a Question Mark “?” and Colon “:” Operator Used for? [duplicate]
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This is the ternary conditional operator, which can be used anywhere, not just the print statement. It's sometimes just called "the ternary operator", but it's not the only ternary operator, just the most common one.
Here's a g...
Locking pattern for proper use of .NET MemoryCache
I assume this code has concurrency issues:
9 Answers
9
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How to dynamically load a Python class
...iven a string of a Python class, e.g. my_package.my_module.MyClass , what is the best possible way to load it?
10 Answers
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Stopping scripters from slamming your website
This is about the bag o' crap sales on woot.com. I'm the president of Woot Workshop, the subsidiary of Woot that does the design, writes the product descriptions, podcasts, blog posts, and moderates the forums. I work with CSS/HTML and am only barely familiar with other technologies. I work closely ...
What is MOJO in Maven?
I'm reading about Maven right now and everywhere in a text I see this word (mojo). I approximately understand what it means, but I would not refuse from a good explanation. I tried to google, but found only non-maven explanations.
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