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Is there auto type inferring in Java?
...t this was closed as "Will not fix", reason given was :
Humans benefit from the redundancy of the type declaration in two ways.
First, the redundant type serves as valuable documentation - readers do not
have to search for the declaration of getMap() to find out what type it
r...
How does collections.defaultdict work?
...igure out what this method means. Can somebody help? Here are two examples from the python docs
15 Answers
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Is it possible to implement dynamic getters/setters in JavaScript?
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2013 and 2015 Update (see below for the original answer from 2011):
This changed as of the ES2015 (aka "ES6") specification: JavaScript now has proxies. Proxies let you create objects that are true proxies for (facades on) other objects. Here's a simple example that turns any pro...
Remove first element from $@ in bash [duplicate]
I'm writing a bash script that needs to loop over the arguments passed into the script. However, the first argument shouldn't be looped over, and instead needs to be checked before the loop.
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Clear text from textarea with selenium
...versions. It seems unlikely that the devs would remove this functionality from chromedriver deliberatly.
– Isaac
Sep 12 '15 at 15:25
7
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Assigning a variable NaN in python without numpy
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Yes -- use math.nan.
>>> from math import nan
>>> print(nan)
nan
>>> print(nan + 2)
nan
>>> nan == nan
False
>>> import math
>>> math.isnan(nan)
True
Before Python 3.5, one could use float("nan") (case i...
How do I avoid capturing self in blocks when implementing an API?
...swer
Instead of accessing self directly, you should access it indirectly, from a reference that will not be retained. If you're not using Automatic Reference Counting (ARC), you can do this:
__block MyDataProcessor *dp = self;
self.progressBlock = ^(CGFloat percentComplete) {
[dp.delegate myAP...
java.io.Console support in Eclipse IDE
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I assume you want to be able to use step-through debugging from Eclipse. You can just run the classes externally by setting the built classes in the bin directories on the JRE classpath.
java -cp workspace\p1\bin;workspace\p2\bin foo.Main
You can debug using the remote debugger an...
How do I pass a variable by reference?
...ay, struct, whatever), but you couldn't change the pointer that was copied from the outer scope - when you were done with the function, the original pointer still pointed to the same address. C++ introduced references, which behaved differently.
– Blair Conrad
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Why use Object.prototype.hasOwnProperty.call(myObj, prop) instead of myObj.hasOwnProperty(prop)?
If I understand correctly, each and every object in Javascript inherits from the Object prototype, which means that each and every object in Javascript has access to the hasOwnProperty function through its prototype chain.
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