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How do I access the command history from IDLE?
On bash or Window's Command Prompt, we can press the up arrow on keyboard to get the last command, and edit it, and press ENTER again to see the result.
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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:
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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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