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Equation (expression) parser with precedence?
...hm can be found here: andreinc.net/2010/10/05/… (with implementations in Java and python)
– Andrei Ciobanu
Oct 6 '10 at 6:53
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Are there good reasons not to use an ORM? [closed]
...grate data to a new database model. It is often quite a good way wrapping Java layers around legacy PL/SQL code bases, or re-targeting rich client VB, Powerbuilder or Delphi apps with web interfaces.
A variation is where you inherit a data model that is not necessarily well suited to O-R mapping. ...
What is hashCode used for? Is it unique?
...port using the object as a key for hash tables. (A similar thing exists in Java etc). The goal is for every object to return a distinct hash code, but this often can't be absolutely guaranteed. It is required though that two logically equal objects return the same hash code.
A typical hash table i...
Is calculating an MD5 hash less CPU intensive than SHA family functions?
... This is with sphlib, a library of hash function implementations in C (and Java). All implementations are from the same author (me) and were made with comparable efforts at optimizations; thus the speed differences can be considered as really intrinsic to the functions.
As a point of comparison, co...
Creating a singleton in Python
...y are bad, but because it is very easy for them to go bad. (As a side note Java enumeration are just these kind of singletons. As long as you don't put state into your enumeration you are OK, so please don't.)
The other kind of Singletons, which are semi-acceptable are those which don't effect the e...
REST vs JSON-RPC? [closed]
...inion on the issue, but now something that can be really helpful for those Java developers reading these lines, the framework I have been working on during the last year, born from the same question you are wondering now:
http://rpc.brutusin.org
You can see a live demo here, showing the built-in r...
How do I initialize a TypeScript object with a JSON object
...other languages where I'm aware of deserialization of any kind. Of course, Javascript won't complain if you call a non-default constructor with no arguments, but the class better be prepared for it then (plus, it wouldn't really be the "typescripty way").
Option #1: No run-time information at all
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How do you calculate the average of a set of circular data? [closed]
...n is {65,92,230,320,250}.
Here is an implementation of the algorithm in Java, including some optimisations, its complexity is O(nlogn). It can be reduced to O(n) if you replace the comparison based sort with a non comparison based sort, such as radix sort.
static double varnc(double _mean, int ...
Are arrays in PHP copied as value or as reference to new variables, and when passed to functions?
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By default
Primitives are passed by value. Unlikely to Java, string is primitive in PHP
Arrays of primitives are passed by value
Objects are passed by reference
Arrays of objects are passed by value (the array) but each object is passed by reference.
<?php
$obj=new stdClass()...
How to read a large file - line by line?
...l byte offset reader as shown above. H2O does parallel file reading using java, is callable by python and R programs, and is crazy fast, faster than anything on the planet at reading big CSV files.
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