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Fastest way to flatten / un-flatten nested JSON objects
...implementation:
Object.unflatten = function(data) {
"use strict";
if (Object(data) !== data || Array.isArray(data))
return data;
var regex = /\.?([^.\[\]]+)|\[(\d+)\]/g,
resultholder = {};
for (var p in data) {
var cur = resultholder,
prop = "",
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A JRE or JDK must be available in order to run Eclipse. No JVM was found after searching the followi
...e to open, have used eclipse before and has open before without a problem. Now I keep getting the following error message:
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Python Regex - How to Get Positions and Values of Matches
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@StevenWernerCS start() may accept a group number, so if you want an index of nth group, use start(n)
– Hi-Angel
Jun 6 at 21:55
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Trimming a huge (3.5 GB) csv file to read into R
...) for 40 years. In short, it's huge, and it's not going to fit into memory if I try to simply read it.
13 Answers
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Algorithm for creating a school timetable
I've been wondering if there are known solutions for algorithm of creating a school timetable. Basically, it's about optimizing "hour-dispersion" (both in teachers and classes case) for given class-subject-teacher associations. We can assume that we have sets of classes, lesson subjects and teacher...
How do PHP sessions work? (not “how are they used?”)
...ow Does PHP Session Works
Firstly PHP creates a 16-byte long unique identifier number (stored as a string of 32 hexadecimal characters, e.g a86b10aeb5cd56434f8691799b1d9360) for an individual session.
PHPSESSID cookie passes that unique identification number to users' browser to save that number.
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What does it mean for a data structure to be “intrusive”?
...sive data structure would be an ordered list of elements that are mutable. If the element changes, the list needs to be reordered, so the list object has to intrude on the privacy of the elements in order to get their cooperation. ie. the element has to know about the list it is in, and inform it of...
window.location.href and window.open () methods in JavaScript
What is the difference between window.location.href and window.open () methods in JavaScript?
6 Answers
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What does this symbol mean in JavaScript?
This is a collection of questions that come up every now and then about syntax in JavaScript. This is also a Community Wiki, so everyone is invited to participate in maintaining this list.
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Get item in the list in Scala?
... do that with lists very often, since linked lists take time to traverse. If you want to index into a collection, use Vector (immutable) or ArrayBuffer (mutable) or possibly Array (which is just a Java array, except again you index into it with (i) instead of [i]).
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