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The most accurate way to check JS object's type?
...lean...) and use Object.prototype.toString to solve something complex(like Array, Date, RegExp).
and this is my solution:
var type = (function(global) {
var cache = {};
return function(obj) {
var key;
return obj === null ? 'null' // null
: obj === global ? 'glob...
Rails raw SQL example
...
You can do this:
sql = "Select * from ... your sql query here"
records_array = ActiveRecord::Base.connection.execute(sql)
records_array would then be the result of your sql query in an array which you can iterate through.
...
Most efficient way to remove special characters from string
...aracter into a local variable or use an enumerator to reduce the number of array accesses:
public static string RemoveSpecialCharacters(this string str) {
StringBuilder sb = new StringBuilder();
foreach (char c in str) {
if ((c >= '0' && c <= '9') || (c >= 'A' &&...
How do you divide each element in a list by an int?
... you tried first is actually directly possible with numpy:
import numpy
myArray = numpy.array([10,20,30,40,50,60,70,80,90])
myInt = 10
newArray = myArray/myInt
If you do such operations with long lists and especially in any sort of scientific computing project, I would really advise using numpy.
...
GSON throwing “Expected BEGIN_OBJECT but was BEGIN_ARRAY”?
...ou're telling Gson you have an object of your type. You don't. You have an array of objects of your type. You can't just try and cast the result like that and expect it to magically work ;)
The User guide for Gson Explains how to deal with this:
https://github.com/google/gson/blob/master/UserGuide...
instantiate a class from a variable in PHP?
...lectionClass($className);
$module = $reflectionClass->newInstanceArgs($arrayOfConstructorParameters);
More information on dynamic classes and parameters
PHP >= 5.6
As of PHP 5.6 you can simplify this even more by using Argument Unpacking:
// The "..." is part of the language and indicate...
Can mustache iterate a top-level array?
...
How do I get, for example, the 2nd element of the array? I'm trying to do {{.1}} with mustache.js and its not working.
– thouliha
Apr 2 '15 at 17:22
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Read text file into string array (and write)
The ability to read (and write) a text file into and out of a string array is I believe a fairly common requirement. It is also quite useful when starting with a language removing the need initially to access a database. Does one exist in Golang?
e.g.
...
Write a program to find 100 largest numbers out of an array of 1 billion numbers
...w where I was asked "write a program to find 100 largest numbers out of an array of 1 billion numbers."
33 Answers
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Heap vs Binary Search Tree (BST)
... explained in this answer
***: log(n) for pointer tree heap, n for dynamic array heap
Advantages of binary heap over a BST
average time insertion into a binary heap is O(1), for BST is O(log(n)). This is the killer feature of heaps.
There are also other heaps which reach O(1) amortized (stronge...