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Simplest way to check if key exists in object using CoffeeScript
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key of obj
This compiles to JavaScript's key in obj. (CoffeeScript uses of when referring to keys, and in when referring to array values: val in arr will test whether val is in arr.)
thejh's answer is correct if you want to ignore the objec...
Determine if an object property is ko.observable
...ervable(). You can call it like ko.isObservable(vm[key]).
Update from comment:
Here is a function to determine if something is a computed observable:
ko.isComputed = function (instance) {
if ((instance === null) || (instance === undefined) || (instance.__ko_proto__ === undefined)) return ...
throw Error('msg') vs throw new Error('msg')
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@paulmelnikow - Yes. Backward compatibility is TC39's highest priority. The mantra is "don't break the web."
– T.J. Crowder
Dec 10 '18 at 7:41
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Looping over a list in Python
... print x
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[1, 2, 3]
[8, 9, 10]
or if you need more pythonic use list-comprehensions
>>> [x for x in mylist if len(x)==3]
[[1, 2, 3], [8, 9, 10]]
>>>
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How to “re-run with -deprecation for details” in sbt?
When I compile Scala code, by running sbt compile , SBT says:
3 Answers
3
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What are the differences between -std=c++11 and -std=gnu++11?
What are the differences between -std=c++11 and -std=gnu++11 as compilation parameter for gcc and clang? Same question with c99 and gnu99 ? I know about C++ and C standards, it's the differences in the parameters that interest me.
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Hover and Active only when not disabled
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Remove menu and status bars in TinyMCE 4
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shared_ptr to an array : should it be used?
...ate<class Y> explicit shared_ptr(Y* p);
Requires: Y shall be a complete type. The expression delete[] p, when T is an array type, or delete p, when T is not an array type, shall have well-defined behavior, and shall not throw exceptions.
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Remarks: When T is an array type, this con...
How to use Checkbox inside Select Option
...positioning
How to overlay one div over another div
http://www.w3schools.com/css/css_positioning.asp
CSS display property
http://www.w3schools.com/cssref/pr_class_display.asp
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