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Linux: compute a single hash for a given folder & contents?

...to/folder -type f -print0 | sort -z | xargs -0 sha1sum | sha1sum And, finally, if you also need to take account of permissions and empty directories: (find path/to/folder -type f -print0 | sort -z | xargs -0 sha1sum; find path/to/folder \( -type f -o -type d \) -print0 | sort -z | \ xargs -0...
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Uploading images using Node.js, Express, and Mongoose

...b. // Expose modules in ./support for demo purposes require.paths.unshift(__dirname + '/../../support'); /** * Module dependencies. */ var express = require('../../lib/express') , form = require('connect-form'); var app = express.createServer( // connect-form (http://github.com/visionmedia...
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What is the difference between a pseudo-class and a pseudo-element in CSS?

...nsists of a "colon" (:) followed by the name of the pseudo-class and optionally by a value between parentheses. Pseudo-classes are allowed in all sequences of simple selectors contained in a selector. Pseudo-classes are allowed anywhere in sequences of simple selectors, after the leading type s...
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NodeJS - What does “socket hang up” actually mean?

... socket hang up] code: 'ECONNRESET' } at ClientRequest.proxyError (your_server_code_error_handler.js:137:15) at ClientRequest.emit (events.js:117:20) at Socket.socketCloseListener (http.js:1526:9) at Socket.emit (events.js:95:17) at TCP.close (net.js:465:12) Line http.js:1526:9...
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The remote end hung up unexpectedly while git cloning

... Quick solution: With this kind of error, I usually start by raising the postBuffer size by: git config --global http.postBuffer 524288000 (some comments below report having to double the value): git config --global http.postBuffer 1048576000 More information: From...
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Ruby class instance variable vs. class variable

...n store something common to that class without having sub-classes automatically also get them (and vice-versa). With class variables, you have the convenience of not having to write self.class from an instance object, and (when desirable) you also get automatic sharing throughout the class hierarchy...
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How to get UILabel to respond to tap?

...= UITapGestureRecognizer(target: self, action: #selector(self.actionTapped(_:))) tempLabel?.isUserInteractionEnabled = true tempLabel?.addGestureRecognizer(tapAction) Action receiver func actionTapped(_ sender: UITapGestureRecognizer) { // code here } Swift 4.0 Initialize the gesture...
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What is the difference between integration and unit tests?

I know the so-called textbook definition of unit tests and integration tests. What I am curious about is when it is time to write unit tests... I will write them to cover as many sets of classes as possible. ...
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Best way to initialize (empty) array in PHP

...ferent ways, with the literal grammar not being dogged by the overhead of calling a function. PHP, on the other hand, has language constructs that may look like functions but aren't treated as such. Even with PHP 5.4, which supports [] as an alternative, there is no difference in overhead because...
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Remove the legend on a matplotlib figure

....0rc4, a remove method has been added to the legend object. Usage: ax.get_legend().remove() or legend = ax.legend(...) ... legend.remove() See here for the commit where this was introduced. share | ...