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Serializing object that contains cyclic object value
...
if (stack.includes(obj))
return null;
let s = stack.concat([obj]);
return Array.isArray(obj)
? obj.map(x => decycle(x, s))
: Object.fromEntries(
Object.entries(obj)
.map(([k, v]) => [k, decycle(v, s)]));
}
//
...
How to make a flat list out of list of lists?
...ssentially a wrapper around timeit), and found
functools.reduce(operator.iconcat, a, [])
to be the fastest solution, both when many small lists and few long lists are concatenated. (operator.iadd is equally fast.)
Code to reproduce the plot:
import functools
import itertools
import numpy
...
How can I get a JavaScript stack trace when I throw an exception?
...trace() {
function st2(f) {
return !f ? [] :
st2(f.caller).concat([f.toString().split('(')[0].substring(9) + '(' + f.arguments.join(',') + ')']);
}
return st2(arguments.callee.caller);
}
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Java multiline string
...
Furthermore, the first version will be automatically concatenated by the compiler, since all the strings are known at compile time. Even if the strings are not known at compile time, it's no slower than StringBuilder or String.format(). The only reason to avoid concatenation wi...
How does the String class override the + operator?
...ls of the string conversion context.
15.18.1.
Optimization of String Concatenation :
An implementation may choose to perform conversion and concatenation
in one step to avoid creating and then discarding an intermediate
String object. To increase the performance of repeated string
conc...
Count the items from a IEnumerable without iterating?
...
...in cases where things like Enumerable.Concat are used to combine a large collection which knows a lot about itself with a small one that doesn't.
– supercat
Feb 19 '15 at 20:16
...
Get current domain
... mostly importantly it includes the port number so that I do not need to concat it afterwards. phpinfo suggested by bsdnoobz helps me to find the right solution though.
– user1021364
Aug 8 '14 at 4:14
...
How can I get a resource “Folder” from inside my jar File?
...nput Stream will have all the files name from that dir. After that you can concat the dir path with each file name and call getResourceAsStream for each file in a loop.
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...
Reading large text files with streams in C#
...gBuilder need to read the MSDN more often:
Performance Considerations
The Concat and AppendFormat methods both concatenate new data to an existing String or StringBuilder object. A String object concatenation operation always creates a new object from the existing string and the new data. A StringB...
What is the difference between a mutable and immutable string in C#?
...is mutable)
so if you have to alter a string many times, such as multiple concatenations, then use StringBuilder.
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