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Why is React's concept of Virtual DOM said to be more performant than dirty model checking?
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Here's a comment by React team member Sebastian Markbåge which sheds some light:
React does the diffing on the output (which is a known serializable format, DOM attributes). This means that the source data can be of any format. It can be immutable data structures and state in...
HTML5 Canvas vs. SVG vs. div
What is the best approach for creating elements on the fly and being able to move them around? For example, let's say I want to create a rectangle, circle and polygon and then select those objects and move them around.
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Retrieving the last record in each group - MySQL
There is a table messages that contains data as shown below:
27 Answers
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Can you configure log4net in code instead of using a config file?
... setting hierarchy.Configured = true;.
– Eivind Gussiås Løkseth
Apr 5 '17 at 14:49
3
Make sure ...
How is mime type of an uploaded file determined by browser?
...An example: when uploading a CSV file from a Windows system with Microsoft Excel installed, Chrome will report this as application/vnd.ms-excel. This is because .csv is not specified in the first hard-coded list, so the browser falls back to the system registry. HKEY_CLASSES_ROOT\.csv has a value na...
Python CSV error: line contains NULL byte
...\xe1 is the "signature" denoting an OLE2 Compound Document file -- e.g. an Excel 97-2003 .XLS file. I find "in a text editor it looks like a perfectly reasonable CSV file" to be utterly unbelievable. You must have been looking at a different file, a valid CSV file, in another folder or on another ma...
How to change the default charset of a MySQL table?
There is a MySQL table which has this definition taken from SQLYog Enterprise :
5 Answers
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Simple way to encode a string according to a password?
...re cipher. It is one of the strongest of the simple ancient ciphers.
Vigenère cipher
It's quick and easy to implement. Something like:
import base64
def encode(key, string):
encoded_chars = []
for i in xrange(len(string)):
key_c = key[i % len(key)]
encoded_c = chr(ord(st...
How to print pandas DataFrame without index
...s not contain the tab-sep anymore which is than a handicap when copying to excel
– Rockbar
Oct 5 '17 at 12:30
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How do I use $scope.$watch and $scope.$apply in AngularJS?
... Using this.myVar puts myVar on the scope.
– Marcus Rådell
Oct 3 '14 at 12:15
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