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What is the best way to convert an array to a hash in Ruby
... throws an error:
ArgumentError: odd number of arguments for Hash
from (irb):10:in `[]'
from (irb):10
The constructor was expecting an Array of even length (e.g. ['k1','v1,'k2','v2']). What's worse is that a different Array which flattened to an even length would just silently gi...
How do I measure the execution time of JavaScript code with callbacks?
... @gogaman this is a good point, since you can't capture the output from console.timeEnd(). Perhaps it might be useful to pipe the output to a file and utilize from there?
– Doug Molineux
Sep 25 '14 at 21:16
...
Why does Java allow us to compile a class with a name different than the file name?
...ots of single method interface implementations in their own separate files from the main class they are used in. (I'm thinking of action listeners in particular)
There is a good explanation of all nested classes in the Nested Classes Java tutorial on Oracle's website, which has examples of each. It...
What's the difference between `=` and `
...
From here:
The operators <- and = assign into the environment in which they are evaluated. The operator <- can be used anywhere, whereas the operator = is only allowed at the top level (e.g., in the complete express...
Maven dependency spring-web vs spring-webmvc
...
From the official doc:
The spring-web module provides basic web-oriented integration features such as multipart file upload functionality and the initialization of the IoC container using Servlet listeners and a web-oriented ...
Is there a pattern for initializing objects created via a DI container
...n up too much of your implementation's state (i.e. what is to stop someone from re-calling initialize or the setter?).
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Add up a column of numbers at the Unix shell
...
... | paste -sd+ - | bc
is the shortest one I've found (from the UNIX Command Line blog).
Edit: added the - argument for portability, thanks @Dogbert and @Owen.
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Serializing object that contains cyclic object value
...y.isArray(obj)
? obj.map(x => decycle(x, s))
: Object.fromEntries(
Object.entries(obj)
.map(([k, v]) => [k, decycle(v, s)]));
}
//
let a = {b: [1, 2, 3]}
a.b.push(a);
console.log(JSON.stringify(decycle(a)))
...
Get fully qualified class name of an object in Python
...ore circumspect approach.
# Alas, the module name is explicitly excluded from __qualname__
# in Python 3.
module = o.__class__.__module__
if module is None or module == str.__class__.__module__:
return o.__class__.__name__ # Avoid reporting __builtin__
else:
return module + '.' +...
Gson - convert from Json to a typed ArrayList
...y use TypeToken to load the json string into a custom object.
logs = gson.fromJson(br, new TypeToken<List<JsonLog>>(){}.getType());
Documentation:
Represents a generic type T.
Java doesn't yet provide a way to represent generic types, so this class does. Forces clients to cr...