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Bash conditionals: how to “and” expressions? (if [ ! -z $VAR && -e $VAR ])
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From the bash manpage:
[[ expression ]] - return a status of 0 or 1 depending on the evaluation of the conditional expression expression.
And, for expressions, one of the options is:
expression1 && expressi...
ActiveMQ or RabbitMQ or ZeroMQ or [closed]
... Having worked in RabbitMQ and ActiveMQ I would recommend you stay away from ActiveMQ. The releases are very buggy, and I had no end of problems with machines going down and memory leaks etc... RabbitMQ on the other hand just works. After I plugged it in I've NEVER had to look at it again. It jus...
Vim: Move cursor to its last position
...) any motion command other than the i j k l movements. (The complete list, from the help docs, is "'"', "`", "G", "/", "?", n", "N", "%", "(", ")", "[[", "]]", "{", "}", ":s", ":tag", "L", "M", H" and the commands that start editing a new file.) So no, this won't "undo" 2j or similar, but it will wo...
How to simulate a click by using x,y coordinates in JavaScript?
...into thinking it was clicked.
All modern browsers support document.elementFromPoint and HTMLElement.prototype.click(), since at least IE 6, Firefox 5, any version of Chrome and probably any version of Safari you're likely to care about. It will even follow links and submit forms:
document.element...
Get hostname of current request in node.js Express
...the hostname that a request object I'm sending a response to was requested from.
5 Answers
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What values should I use for CFBundleVersion and CFBundleShortVersionString?
...the same build numbers again in different release trains if you want to.
From Technical Note TN2420: Version Numbers and Build Numbers.
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Why does Typescript use the keyword “export” to make classes and interfaces public?
...argue that "they should have used "export" instead of "public", but asides from "export/private/protected" being a poorly matched set of access modifiers, I believe there is a subtle difference between the two that explains this.
In TypeScript, marking a class member as public or private has no eff...
Vertically align text to top within a UILabel
...iately undo the effects of your sizeToFit call. However, calling sizeToFit from within viewDidLayoutSubviews will work.
My Original Answer (for posterity/reference):
This uses the NSString method sizeWithFont:constrainedToSize:lineBreakMode: to calculate the frame height needed to fit a string, ...
Matplotlib scatterplot; colour as a function of a third variable
...sed the y position of the point as the value that determines the color:
from matplotlib import pyplot as plt
x = [1, 2, 3, 4, 5, 6, 7, 8, 9]
y = [125, 32, 54, 253, 67, 87, 233, 56, 67]
color = [str(item/255.) for item in y]
plt.scatter(x, y, s=500, c=color)
plt.show()
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Is it OK to leave a channel open?
... not constitute a reference to the channel object, and so does not keep it from being garbage collected.
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