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How can I declare optional function parameters in Javascript? [duplicate]
...
With ES6: This is now part of the language:
function myFunc(a, b = 0) {
// function body
}
Please keep in mind that ES6 checks the values against undefined and not against truthy-ness (so only real undefined values get the default value ...
How does this print “hello world”?
...g the number with the mask 31₁₀ = 11111₂ in the sentence l & 31
Now the code maps the 5-bit value to its corresponding 7-bit ascii character. This is the tricky part, check the binary representations for the lowercase
alphabet letters in the following table:
ascii | ascii | ...
jQuery: Return data after ajax call success [duplicate]
...#test-arrow_functions
UPDATE (2017)
There is an even newer syntax right now called async functions with a new await keyword that instead of this code:
functionReturningPromise()
.then(data => console.log('Data:', data))
.catch(error => console.log('Error:', error));
lets you writ...
Why always ./configure; make; make install; as 3 separate steps?
...o make install because only root can copy files to /usr and /usr/local.
Now you see that each step is a pre-requirement for next step. Each step is a preparation to make things work in a problemless flow. Distros use this metaphor to build packages (like RPM, deb, etc.).
Here you'll see that ea...
手握利器，直面“蓝脸”! ——使用WinDbg抗击系统崩溃 - 操作系统(内核) - ...
...程序在队列工作项目完成之前卸载”造成的。这个“DRIVER_UNLOADED_WITHOUT_CANCELLING_PENDING_OPERATIONS”就应该是显示在蓝屏上方的错误说明字样，后面的Arguments1~4就是蓝屏时停止代码后面的四个参数。图中区域2所示的BUGCHECK_STR是WinDbg中...
jQuery if checkbox is checked
...:checked')) {
// Do something...
alert('You can rock now...');
};
});
});
</script>
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How do I style a dropdown with only CSS?
... have no way of removing the default arrow (which would mean that we would now have two arrows), but, we could use a funky Internet Explorer 9 selector.
To at least undo our custom arrow - leaving the default select arrow intact.
/* Target Internet Explorer 9 to undo the custom arrow */
@media scr...
What is the usefulness of PUT and DELETE HTTP request methods?
...ike this: /blog/article/1 would invoke blogController::articleAction($id);
Now this Router is only aware of the URL or /blog/article/1/
But if that Router would be aware of whole HTTP Request object instead of just URL, he could have access HTTP Request verb (GET, POST, PUT, DELETE...), and many ot...
Using Build Flavors - Structuring source folders and build.gradle correctly
... ...
}
prod {
...
}
}
Now, we will have two different flavors of our app. You can check it on Android Studio too inside the Build Variants tab
Build variants
Multiple package names
What if you want to have installed on your phone one app with d...
Performant Entity Serialization: BSON vs MessagePack (vs JSON)
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MessagePack now has a BINARY data type so the argument of 1-1 de-serialization compatibility to JSON is not entirely true anymore.
– zimbatm
Aug 19 '15 at 13:14
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