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rsync error: failed to set times on “/foo/bar”: Operation not permitted

...rom rsync and the initial things I'm finding from web searches (as well as all the usual chmod'ing) are not solving it: 9 A...
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psql: FATAL: database “” does not exist

... it in the past on other machines but it's giving me some trouble when installing on my macbook. I've installed the application and I ran: ...
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When should I use Arrow functions in ECMAScript 6?

... A while ago our team migrated all its code (a mid-sized AngularJS app) to JavaScript compiled using Traceur Babel. I'm now using the following rule of thumb for functions in ES6 and beyond: Use function in the global scope and for Object.prototype prope...
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How does the bitwise complement operator (~ tilde) work?

...ng the binary representation of a number, taking its complement (inverting all the bits) and adding one. Two starts as 0000 0010, and by inverting the bits we get 1111 1101. Adding one gets us the result above. The first bit is the sign bit, implying a negative. So let's take a look at how we get ~2...
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Run MySQLDump without Locking Tables

...bles you can use the --single-transaction option: --lock-tables, -l Lock all tables before dumping them. The tables are locked with READ LOCAL to allow concurrent inserts in the case of MyISAM tables. For transactional tables such as InnoDB and BDB, --single-transaction is a much better option, be...
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Swift: Pass array by reference?

... @Boon Array is still semantically copied/passed-by-value, but just optimised to use COW. – eonil Oct 14 '14 at 3:38 ...
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Streaming a video file to an html5 video player with Node.js so that the video controls continue to

...to get the size of the file without reading the whole file into memory. Finally, use fs.createReadStream to send the requested part to the client. var fs = require("fs"), http = require("http"), url = require("url"), path = require("path"); http.createServer(function (req, res) { if ...
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Regular vs Context Free Grammars

...ammar is either right or left linear, whereas context free grammar is basically any combination of terminals and non-terminals. Hence you can see that regular grammar is a subset of context-free grammar. So for a palindrome for instance, is of the form, S->ABA A->something B->something ...
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How to change webservice url endpoint?

...he endpoint URL The first option is to change the BindingProvider.ENDPOINT_ADDRESS_PROPERTY property value of the BindingProvider (every proxy implements javax.xml.ws.BindingProvider interface): ... EchoService service = new EchoService(); Echo port = service.getEchoPort(); /* Set NEW Endpoint Lo...
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Generating a unique machine id

...yourself and hash it to an arbitrary length. See the PDF specification for all SMBIOS structures available. To query the SMBIOS info from Windows you could use EnumSystemFirmwareEntries, EnumSystemFirmwareTables and GetSystemFirmwareTable. IIRC, the "unique id" from the CPUID instruction is deprec...