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What are the differences between JSON and JavaScript object? [duplicate]
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First you should know what JSON is:
It is language agnostic data-interchange format.
The syntax of JSON was inspired by the JavaScript Object Literal notation, but there are differences between them.
For example, in JSON all keys must be quoted, while in object literals this is not nece...
Ternary operator is twice as slow as an if-else block?
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To answer this question, we'll examine the assembly code produced by the X86 and X64 JITs for each of these cases.
X86, if/then
32: foreach (int i in array)
0000007c 33 D2 xor edx,edx
0000007e 83 7E 04 00 ...
String concatenation vs. string substitution in Python
In Python, the where and when of using string concatenation versus string substitution eludes me. As the string concatenation has seen large boosts in performance, is this (becoming more) a stylistic decision rather than a practical one?
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Could not load type from assembly error
I have written the following simple test in trying to learn Castle Windsor's Fluent Interface:
25 Answers
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Why does Windows64 use a different calling convention from all other OSes on x86-64?
AMD has an ABI specification that describes the calling convention to use on x86-64. All OSes follow it, except for Windows which has it's own x86-64 calling convention. Why?
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return, return None, and no return at all?
...that's it. However, there is a time and place for all of these.
The following instructions are basically how the different methods should be used (or at least how I was taught they should be used), but they are not absolute rules so you can mix them up if you feel necessary to.
Using return None
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How are multi-dimensional arrays formatted in memory?
In C, I know I can dynamically allocate a two-dimensional array on the heap using the following code:
6 Answers
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sort object properties and JSON.stringify
My application has a large array of objects, which I stringify and save them to the disk. Unfortunately, when the objects in the array are manipulated, and sometimes replaced, the properties on the objects are listed in different orders (their creation order?). When I do JSON.stringify() on the arr...
Iterate over a Javascript associative array in sorted order
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You cannot iterate over them directly, but you can find all the keys and then just sort them.
var a = new Array();
a['b'] = 1;
a['z'] = 1;
a['a'] = 1;
function keys(obj)
{
var keys = [];
for(var key in obj)
{
if(obj.hasOwnProperty(key))
{
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What is declarative programming? [closed]
I keep hearing this term tossed around in several different contexts. What is it?
18 Answers
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