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How does facebook, gmail send the real time notification?
I have read some posts about this topic and the answers are comet, reverse ajax, http streaming, server push, etc.
5 Answer...
JavaScript: Passing parameters to a callback function
... variable like so:
function tryMe (param1, param2) {
alert(param1 + " and " + param2);
}
function callbackTester (callback) {
callback (arguments[1], arguments[2]);
}
callbackTester (tryMe, "hello", "goodbye");
But otherwise, your example works fine (arguments[0] can be used in place of...
Why we should not use protected static in java
...able exists at class level, it does not exist separately for each instance and it does not have an independent existence in classes which extend me.
Think about what protected means:
This variable can be seen by this class, classes in the same package and classes which extend me.
The two mea...
Can anyone explain what JSONP is, in layman terms? [duplicate]
...
Preface:
This answer is over six years old. While the concepts and application of JSONP haven't changed
(i.e. the details of the answer are still valid), you should
look to use CORS where possible
(i.e. your server or
API supports it, and the
browser support is adequate),
as JSONP has in...
var functionName = function() {} vs function functionName() {}
...intaining someone else's JavaScript code. I'm fixing bugs, adding features and also trying to tidy up the code and make it more consistent.
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What's wrong with nullable columns in composite primary keys?
...keys is not clean relational database design.
If there are two entities A and B where A can optionally be related to B, the clean solution is to create a resolution table (let's say AB). That table would link A with B: If there is a relationship then it would contain a record, if there isn't then i...
Why does the arrow (->) operator in C exist?
...
I'll interpret your question as two questions: 1) why -> even exists, and 2) why . does not automatically dereference the pointer. Answers to both questions have historical roots.
Why does -> even exist?
In one of the very first versions of C language (which I will refer as CRM for "C Refe...
What are the differences between double-dot “..” and triple-dot “…” in Git commit ranges?
Some Git commands take commit ranges and one valid syntax is to separate two commit names with two dots .. , and another syntax uses three dots ... .
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UIDevice uniqueIdentifier deprecated - What to do now?
...ght that the UIDevice uniqueIdentifier property is deprecated in iOS 5 and unavailable in iOS 7 and above. No alternative method or property appears to be available or forthcoming.
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Calling Java from Python
What is the best way to call java from python?
(jython and RPC are not an option for me).
9 Answers
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