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JavaScript validation for empty input field
...
An input field can have whitespaces, we want to prevent that.
Use String.prototype.trim():
function isEmpty(str) {
return !str.trim().length;
}
Example:
const isEmpty = str => !str.trim().length;
document.getElementById("name").addEventListener("input", function() {
if(...
Java inner class and static nested class
...any other object to the static field, a, as in: class B { static void main(string s) {A.a = new A()}} (A & B in same package) This doesn't make A a static class. The phrase "static context," in the reference cited in the thread you linked to, is incredibly vague. In fact, this was noted in many ...
Memcache Vs. Memcached [duplicate]
...c difference while storing value. Memcache mostly considers every value as string whereas Memcached stores it value's original type. Thumbs up for your answer !
– NullPointer
Jun 17 '15 at 2:38
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C++ stl stack/queue 的使用方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ue。
定义stack 对象的示例代码如下：
stack<int> s1;
stack<string> s2;
stack 的基本操作有：
入栈，如例：s.push(x);
出栈，如例：s.pop(); 注意，出栈操作只是删除栈顶元素，并不返回该元素，使用top()访问元素。
访问栈顶，如例：s....
jQuery & CSS - Remove/Add display:none
...line "display:none" via jQuery's css-api is by resetting it with the empty string (null does NOT work btw!!).
According to the jQuery docu this is the general way to "remove" a once set inline style property.
$("#mydiv").css("display","");
or
$("#mydiv").css({display:""});
should do the trick p...
Get operating system info
...
I researched this for a bit, and found a few links explaining the Trident string.
http://www.sitepoint.com/ie11-smells-like-firefox/
http://www.upsdell.ca/BrowserNews/res_sniff.htm
How can I target only Internet Explorer 11 with JavaScript?
http://en.wikipedia.org/wiki/Trident_%28layout_engine%29...
How to explain callbacks in plain english? How are they different from calling one function from ano
...a function, but does not know how to print output. All it can do is make a string. When it tries to figure out what to do with the string, it sees a blank line. But, the programmer gave you the blank to write your callback in!
In this example, you do not use a pencil to fill in a blank on a sheet ...
How to get text box value in JavaScript
...lems as unicode encoding/decoding operations
so
use this function encoding strings/arrays
function urlencode( str )
{
// http://kevin.vanzonneveld.net3.
// + original by: Philip Peterson4.
// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)5.
// * example 1: u...
Get all object attributes in Python? [duplicate]
...looking for, but... attrs = dir(obj) will store the array of attributes as strings in attrs. Then to access them, you can always use getattr(obj, attrs[i]) to get the ith attribute in the attrs array.
– Nick Merrill
Jun 27 '14 at 1:57
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jQuery access input hidden value
...@Html.HiddenFor(m => m.SomeBoolean).)
Then the following will return a string 'False', not a JS boolean!
var notABool = $('#SomeBoolean').val();
If you want to use the boolean for some logic, use the following instead:
var aBool = $('#SomeBoolean').val() === 'True';
if (aBool) { /* ...*/ }
...