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ES6 class variable alternatives
... return this.constructor.MY_CONST;
}
constructor() {
alert(this.MY_CONST === this.constructor.MY_CONST);
}
}
alert(MyClass.MY_CONST);
new MyClass
// alert: string ; true
But if MY_CONST is reference type like static get MY_CONST() {return ['string'];} alert output is str...
Does IE9 support console.log, and is it a real function?
...red to inherit from Object, nor its methods from Function, like native ECMAScript functions and objects do. This is the reason apply and call are undefined on those methods. In IE 9, most DOM objects were improved to inherit from native ECMAScript types. As the developer tools are considered an e...
Check if a key exists inside a json object
...(("merchant_id" in thisSession)==false)
{
// do nothing.
}
else
{
alert("yeah");
}
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/in
http://www.w3schools.com/jsref/jsref_operators.asp
...
Javascript communication between browser tabs/windows [duplicate]
What's the most reliable way to have Javascript communicate between tabs/windows of the same browser? For example, when Tab 2 starts audio playback, Tab 1 somehow knows about this and can pause it's player.
...
Getting a better understanding of callback functions in JavaScript
...) {
// "this" may be different depending how you call the function
alert(this);
};
callback(argument_1, argument_2);
callback.call(some_object, argument_1, argument_2);
callback.apply(some_object, [argument_1, argument_2]);
The method you choose depends whether:
You have the arguments...
How can I detect if a selector returns null?
...
if ( $("#anid").length ) {
alert("element(s) found")
}
else {
alert("nothing found")
}
share
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How to quit android application programmatically
...e pretty close to closing all related activities by its name and Javadoc description:
this.finishAffinity();
Finish this activity as well as all activities immediately below it in the current task that have the same affinity. This is typically used when an application can be launched on to another...
Skip certain tables with mysqldump
...s not a typo).
If you want to ignore multiple tables you can use a simple script like this
#!/bin/bash
PASSWORD=XXXXXX
HOST=XXXXXX
USER=XXXXXX
DATABASE=databasename
DB_FILE=dump.sql
EXCLUDED_TABLES=(
table1
table2
table3
table4
tableN
)
IGNORED_TABLES_STRING=''
for TABLE in "${EXCLUDED_TABLES[...
How to present a simple alert message in java?
Coming from .NET i am so used calling Alert() in desktop apps. However in this java desktop app, I just want to alert a message saying "thank you for using java" I have to go through this much suffering:
...
译文：理解Java中的弱引用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ding-weakreference-in-java不久之前，我面试了一些求职Java高级开发工程师的应聘者。我常常会面试他们说，你能给我介绍一些Java中得弱引用吗？，如果面试者这样说，嗯...原文信息
文章出自 Understanding Weak References
作者为Ethan Nicho...