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Check whether variable is number or string in JavaScript
... This is not correct! There are two possible representations of a string. alert(typeof new String()) will output "Object". Worse, javascript will occasionally convert back and forth between the two representations behind the scenes for optimization purposes
– George Mauer
...
What is a good regular expression to match a URL? [duplicate]
...RegExp(expression);
var t = 'www.google.com';
if (t.match(regex)) {
alert("Successful match");
} else {
alert("No match");
}
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f...
Strip HTML from strings in Python
...l trick this method with something like this: <script<script>>alert("Hi!")<</script>/script>
– user822159
May 23 '13 at 21:13
20
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MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...create list
"greenhouse/status/system",
"greenhouse/status/alerts",
"greenhouse/status/device_status"
2. 连接管理与重连机制
// 智能连接管理
when Screen1.Initialize
do
set MaxRetryCount to 5
set CurrentRetry to 0
set Reconne...
How to detect Safari, Chrome, IE, Firefox and Opera browser?
...xOf("Opera") || navigator.userAgent.indexOf('OPR')) != -1 )
{
alert('Opera');
}
else if(navigator.userAgent.indexOf("Chrome") != -1 )
{
alert('Chrome');
}
else if(navigator.userAgent.indexOf("Safari") != -1)
{
alert('Safari');
}
else if(na...
JavaScript Regular Expression Email Validation [duplicate]
This code is always alerting out "null" , which means that the string does not match the expression.
17 Answers
...
PhoneGap: Detect if running on desktop browser
...pod|ipad|android/i.test(navigator.userAgent);
}
if ( isPhoneGap() ) {
alert("Running on PhoneGap!");
} else {
alert("Not running on PhoneGap!");
}
To complete the other 2% of the cases, follow these steps (it involves a slight change on native code):
Create a file called __phonegap_index...
Custom exception type
...eption();
}
catch (e) {
if (e instanceof NotNumberException) {
alert("not a number");
}
else
if (e instanceof NotPositiveNumberException) {
alert("not a positive number");
}
}
There is another syntax for catching a typed exception, although this won't work in ev...
Class vs. static method in JavaScript
... you can also do is set more functions on Foo:
Foo.talk = function () {
alert('hello world!');
};
This new function can be accessed using:
Foo.talk();
I hope by now you're noticing a similarity between functions on a function object and a static method.
Think of f = new Foo(); as creating a...
Making a Simple Ajax call to controller in asp.net mvc
...loading of DOM elements of that view your Ajax call get fired and displays alert.
Earlier you were only returning JSON to browser without rendering any HTML. Now it has a HTML view rendered where it can get your JSON Data.
You can't directly render JSON its plain data not HTML.
...