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How do I get the opposite (negation) of a Boolean in Python?
...ful if you want to use a function that requires a predicate-function or a callback.
For example map or filter:
>>> lst = [True, False, True, False]
>>> list(map(operator.not_, lst))
[False, True, False, True]
>>> lst = [True, False, True, False]
>>> list(filter...
ROW_NUMBER() in MySQL
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@TomChiverton If it's missing, you get: "Error Code: 1248. Every derived table must have its own alias"
– ExStackChanger
Sep 17 '15 at 9:51
1
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Recommended way of making React component/div draggable
...React.createClass({
getDefaultProps: function () {
return {
// allow the initial position to be passed in as a prop
initialPos: {x: 0, y: 0}
}
},
getInitialState: function () {
return {
pos: this.props.initialPos,
dragging: false,
rel: null // position...
How to allow remote connection to mysql
...and I've tried to connect using navicat from external host and I get 10060 error
– Leo
Feb 8 '13 at 19:03
7
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Programmatically set height on LayoutParams as density-independent pixels
Is there any way to set the height/width of a LayoutParams as density-independent pixels (dp)? It looks like the height/width, when set programmatically, are in pixels and not dp.
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How to find where a method is defined at runtime?
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This is really late, but here's how you can find where a method is defined:
http://gist.github.com/76951
# How to find out where a method comes from.
# Learned this from Dave Thomas while teaching Advanced Ruby Studio
# Makes the cas...
How to document class attributes in Python? [closed]
...y has a specific meaning in python. What you're talking about is what we call class attributes. Since they are always acted upon through their class, I find that it makes sense to document them within the class' doc string. Something like this:
class Albatross(object):
"""A bird with a fligh...
Using an SSH keyfile with Fabric
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Very useful! If you run into errors like IOError: [Errno 2] No such file or directory: ' /path/to/.ssh/key' or Login password for ' root': just make sure you have no whitespaces in your .ssh/config. It's for example User=root instead of User = root...
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Fit background image to div
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answered Nov 13 '18 at 5:05
hojjat.mihojjat.mi
79499 silver badges1616 bronze badges
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'python' is not recognized as an internal or external command [duplicate]
...t the problem is, when I go to cmd and type python testloop.py I get the error:
15 Answers
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