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JavaScript hashmap equivalent
...eys for a regular JavaScript dictionary. After all, you are in the best position to know what makes your objects unique. That's what I do.
Example:
var key = function(obj){
// Some unique object-dependent key
return obj.totallyUniqueEmployeeIdKey; // Just an example
};
var dict = {};
dict[key(...
Look up all descendants of a class in Ruby
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edited Apr 26 '12 at 10:57
answered Mar 6 '10 at 19:04
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Why doesn't String switch statement support a null case?
I am just wondering why the Java 7 switch statement does not support a null case and instead throws NullPointerException ? See the commented line below (example taken from the Java Tutorials article on switch ):
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Laravel Eloquent: How to get only certain columns from joined tables
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edited Jan 12 '15 at 9:52
Bas Peeters
2,97544 gold badges2929 silver badges4747 bronze badges
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CoffeeScript on Windows?
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edited May 23 '17 at 12:26
Community♦
111 silver badge
answered Oct 11 '10 at ...
Should I use string.isEmpty() or “”.equals(string)?
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The main benefit of "".equals(s) is you don't need the null check (equals will check its argument and return false if it's null), which you seem to not care about. If you're not worried about s being null (or are otherwise checking for it)...
Install tkinter for Python
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It is not very easy to install Tkinter locally to use with system-provided Python. You may build it from sources, but this is usually not the best idea with a binary package-based distro you're apparently running.
It's safer...
Javascript: Setting location.href versus location
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You might set location directly because it's slightly shorter. If you're trying to be terse, you can usually omit the window. too.
URL assignments to both location.href and location are defined to work in JavaScript 1.0, back in Netscape 2, and have been implement...
How to sort a list of objects based on an attribute of the objects?
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edited Sep 9 '19 at 12:57
Dorian Turba
72699 silver badges2020 bronze badges
ans...
How to mount a host directory in a Docker container
... possible you cannot map a host directory to a docker container directory within a dockerfile, because the host directory can change depending on which machine you are running on. To map a host directory to a docker container directory you need to use the -v flag when using docker run like so:
dock...