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setState vs replaceState in React.js
... that this.state is {foo: 42}
this.setState({bar: 117})
// this.state is now {foo: 42, bar: 117}
this.setState({foo: 43})
// this.state is now {foo: 43, bar: 117}
this.replaceState({baz: "hello"})
// this.state. is now {baz: "hello"}
Take note of this from the docs, though:
setState() d...
Python try-else
... print('if this prints, we had no error!') # won't print!
print('And now we have left the try block!') # will print!
And now,
>>> handle_error()
handled a RuntimeError, no big deal.
And now we have left the try block!
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Is there a string math evaluator in .NET?
... this is marked as the answer, it was 10 years ago and COM is kind of dead now. I prefer the DataTable.Compute answer below.
– dwilliss
Sep 9 '19 at 19:40
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Android: Difference between Parcelable and Serializable?
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Now the implementation of Parcelable is as fast as Serializable, just press ALT + INSERT on any class implementing Parcelable in Android Studio and the IDE will do it.
– Ali Nem
Nov 25 '...
git merge: apply changes to code that moved to a different file
I am attempting a pretty beefy git merge maneuver right now. One problem that I am coming across is that I made some changes to some code in my branch, but my colleague moved that code to a new file in his branch. So when I did git merge my_branch his_branch , git did not notice that the code in ...
How to run Selenium WebDriver test cases in Chrome?
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Now that's a cumbersome solution. I'd advise you to change this if it's what you use nowadays.
– aimbire
Mar 21 '13 at 17:19
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How can I develop for iPhone using a Windows development machine?
...nged its licensing agreement in regards to virtualization. Source: VMWare KnowledgeBase
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Build fat static library (device + simulator) using Xcode and SDK 4+
... files, PLIST files etc from your library!) - see below (scroll to bottom)
now supports iPhone5 (using Apple's workaround to the bugs in lipo). NOTE: the install instructions have changed (I can probably simplify this by changing the script in future, but don't want to risk it now)
"copy headers" se...
Automatically open Chrome developer tools when new tab/new window is opened
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UPDATE 2:
See this answer . - 2019-11-05
You can also now have it auto-open Developer Tools in Pop-ups if they were open where you opened them from. For example, if you do not have Dev Tools open and you get a popup, it won't open with Dev Tools. But if you Have Dev Tools Open a...
How does one get started with procedural generation?
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Procedural content generation is now all written for the GPU, so you'll need to know a shader language. That means GLSL or HLSL. These are languages tied to OpenGL and DirectX respectively.
While my personal preference is for Dx11 / HLSL due to speed, an ...