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Instance v state variables in react.js
...but not in its state. Whenever state is updated (which should only be done by setState as suggested in a comment), React calls render and makes any necessary changes to the real DOM.
Because the value of timeout has no effect on the rendering of your component, it shouldn't live in state. Putting i...
Why is MATLAB so fast in matrix multiplication?
... of "kernels" (basic routines) that most linear algebra problems needed in order to be solved. These basic operations were then standardized in a specification called: Basic Linear Algebra Subprograms (BLAS). Engineers could then call these standard, well-tested BLAS routines in their code, making t...
XPath - Selecting elements that equal a value
.... defines the string value of an element as the concatenation (in document order) of all of its text-node descendents.
This explains the "strange results".
"Better" results can be obtained using the expressions below:
//*[text() = 'qwerty']
The above selects every element in the document that ...
What is the difference between --save and --save-dev?
... not using your package. They are developing the package further, thus, in order to test your package they need to pass the existing test cases as well write new. So, they need to use your devDependencies which contain all the testing/building/mocking libraries that YOU used.
...
How to create a drop shadow only on one side of an element?
...hat the black shadow must be the last, and has a negative spread (-3px) in order to prevent it from extendig beyond the corners.
Here the fiddle (change the color of the masking shadows to see how it really works).
div{
width: 100px;
height: 100px;
border: 1px solid pink;
b...
JavaScript, elegant way to check nested object properties for null/undefined [duplicate]
...e of using the app this gets populated. Let's say somwhere, after an AJAX call or something i do this:
4 Answers
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Trigger a button click with JavaScript on the Enter key in a text box
... This worked for me due to fact that the inline method, instead of calling function with similar code in it, allows you to return false on the call and avoid postback. In my case the "click" method invokes a __doPostback async call and without the "return false;" would just reload the page.
...
What are the pros and cons to keeping SQL in Stored Procs versus Code [closed]
...will basically do nothing but the following:
(Pseudocode)
Function createOrder(Order yourOrder)
Begin
Call SP_createOrder(yourOrder)
End
So in the end you have your middle tier running on this very cool 4 Server cluster each of them equipped with 16 CPUs and it will actually do nothing at all...
ExecJS::RuntimeError on Windows trying to follow rubytutorial
...
I had to run bundle install after making this change in order for it to work. So if anyone gives this solution a try, and it doesn't appear to work at first, make sure you try that! I'm on windows 8 64-bit, and it worked for me! Thanks
– Peter Kirby
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XML parsing of a variable string in JavaScript
...the document.implementation.createDocument() method. When using Chrome, in order to load an XML file into a XmlDocument object, you need to use the inbuilt XmlHttp object and then load the file by passing it's URI.
In your case, the scenario is different, because you want to load the XML from a str...