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setState vs replaceState in React.js
I am new to React.js Library and I was going over some of the tutorials and I came across:
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How to get Enum Value from index in Java?
I have an enum in Java:
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How to merge 2 JSON objects from 2 files using jq?
I'm using the jq tools (jq-json-processor) in shell script to parse json.
6 Answers
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Why is Python 3.x's super() magic?
In Python 3.x, super() can be called without arguments:
1 Answer
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Why does String.valueOf(null) throw a NullPointerException?
according to the documentation, the method String.valueOf(Object obj) returns:
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Adding additional data to select options using jQuery
Very simple question I hope.
5 Answers
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Emulate ggplot2 default color palette
What function can I use to emulate ggplot2's default color palette for a desired number of colors. For example, an input of 3 would produce a character vector of HEX colors with these colors:
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Is it OK to leave a channel open?
... Go channel open forever and never close it. When the channel is no longer used, it will be garbage collected.
Note that it is only necessary to close a channel if the receiver is
looking for a close. Closing the channel is a control signal on the
channel indicating that no more data follow...
String formatting in Python 3
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Here are the docs about the "new" format syntax. An example would be:
"({:d} goals, ${:d})".format(self.goals, self.penalties)
If both goals and penalties are integers (i.e. their default format is ok), it could be shortened to:
"({} goals, $...
Python “raise from” usage
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The difference is that when you use from, the __cause__ attribute is set and the message states that the exception was directly caused by. If you omit the from then no __cause__ is set, but the __context__ attribute may be set as well, and the traceback t...