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isset() and empty() - what to use
...ing)
0 (0 as an integer)
0.0 (0 as a float)
"0" (0 as a string)
NULL
FALSE
array() (an empty array)
var $var; (a variable declared, but without a value in a class)
From http://php.net/manual/en/function.empty.php
As mentioned in the comments the lack of warning is also important with empty()
P...
jQuery vs document.querySelectorAll
...nsidered
var e = document.querySelector("ul.first");
2) Iterate over the array of child nodes via some (possibly nested or recursive) loops and check the class (classlist not available in all browsers!)
//.find('.foo')
for (var i = 0;i<e.length;i++){
// older browser don't have element.cl...
Why check both isset() and !empty()
...
Empty just check is the refered variable/array has an value if you check the php doc(empty) you'll see this things are considered emtpy
* "" (an empty string)
* 0 (0 as an integer)
* "0" (0 as a string)
* NULL
* FALSE
* array() (an empty array)
* var $var; (a var...
JQuery: 'Uncaught TypeError: Illegal invocation' at ajax request - several elements
...
I've read in JQuery docs that data can be an array (key value pairs).
I get the error if I put:
This is object not an array:
var data = {
'mode': 'filter_city',
'id_A': e[e.selectedIndex]
};
You probably want:
var data = [{
'mode': 'filte...
How to split() a delimited string to a List
...
string.Split() returns an array - you can convert it to a list using ToList():
listStrLineElements = line.Split(',').ToList();
Note that you need to import System.Linq to access the .ToList() function.
...
Solution for “Fatal error: Maximum function nesting level of '100' reached, aborting!” in PHP
...unction calls, work with a queue model to flatten the structure.
$queue = array('http://example.com/first/url');
while (count($queue)) {
$url = array_shift($queue);
$queue = array_merge($queue, find_urls($url));
}
function find_urls($url)
{
$urls = array();
// Some logic filling ...
C++ deprecated conversion from string constant to 'char*'
...Well, C and C++ differ in the type of the string literal. In C the type is array of char and in C++ it is constant array of char. In any case, you are not allowed to change the characters of the string literal, so the const in C++ is not really a restriction but more of a type safety thing. A conver...
Deserializing JSON Object Array with Json.net
...> customer { get; set; }
}
Note that I'm using a List<>, not an Array. Now create the following class:
class MyListConverter : JsonConverter
{
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
var token ...
How to elegantly rename all keys in a hash in Ruby? [duplicate]
...
map returns an Array of Arrays, you can transform back to Hash by using ages.map {...}.to_h
– caesarsol
Sep 17 '14 at 13:49
...
VC的陷阱，看哪些条款会威胁到创业者的利益 - 资讯 - 清泛网 - 专注C/C++及内核技术
...博弈是可以理解的行为。
那么我们就来看看 VC 们可能会使用哪些手段威胁创业者的利益。这些手段并不都是邪恶的，一般也不违法，但是要记住，通往地狱的路由善意铺就。一些条款因为细节上的问题会造成不愉快，可能与创...