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Why would one omit the close tag?

...e file (and possibly some other factors I don't want to bore you with). Finally, many PHP frameworks including Symfony, Zend and Laravel (there is no mention of this in the coding guidelines but it follows the suit) and the PSR-2 standard (item 2.2) require omission of the closing tag. PHP manual it...
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How to add column if not exists on PostgreSQL?

...statement: DO $$ BEGIN BEGIN ALTER TABLE <table_name> ADD COLUMN <column_name> <column_type>; EXCEPTION WHEN duplicate_column THEN RAISE NOTICE 'column <column_name> already exists in <table_name>.'; END; END; $$ ...
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Print a list in reverse order with range()?

...te: If you want to use only range to achieve the same result, you can use all its parameters. range(start, stop, step) For example, to generate a list [5,4,3,2,1,0], you can use the following: range(5, -1, -1) It may be less intuitive but as the comments mention, this is more efficient and the ...
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How to use SSH to run a local shell script on a remote machine?

...ssh user@host2 <<'END2' # Another bunch of commands on another host wall <<'ENDWALL' Error: Out of cheese ENDWALL ftp ftp.secureftp-test.com <<'ENDFTP' test test ls ENDFTP END2 ENDSSH You can actually have a conversation with some services like telnet, ftp, etc. But remember that...
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Saving image from PHP URL

... If you have allow_url_fopen set to true: $url = 'http://example.com/image.php'; $img = '/my/folder/flower.gif'; file_put_contents($img, file_get_contents($url)); Else use cURL: $ch = curl_init('http://example.com/image.php'); $fp = f...
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How to return result of a SELECT inside a function in PostgreSQL?

... -- potential ambiguity END $func$ LANGUAGE plpgsql; Call: SELECT * FROM word_frequency(123); Explanation: It is much more practical to explicitly define the return type than simply declaring it as record. This way you don't have to provide a column definition list with eve...
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Setting up two different static directories in node.js Express framework

...nal (first) parameter to use() like so: app.use("/public", express.static(__dirname + "/public")); app.use("/public2", express.static(__dirname + "/public2")); That way you get two different directories on the web that mirror your local directories, not one url path that fails over between two lo...
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How to iterate for loop in reverse order in swift?

... an array with one trillion Ints! Test: var count = 0 for i in lazy(1...1_000_000_000_000).reverse() { if ++count > 5 { break } println(i) } For Swift 2.0 in Xcode 7: for i in (1...10).reverse() { print(i) } Note that in Swift 2.0, (1...1_000_000_000_000).reverse(...
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cpuid汇编指令 - C/C++ - 清泛网 - 专注C/C++及内核技术

... cpuid cmp eax, 80000004h jb not_supported mov di, offset CPU_name mov eax, 80000002h cpuid call save_string mov eax, 80000003h cpuid ...
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How do I run msbuild from the command line using Windows SDK 7.1?

I'm setting up .NET 4.0 support on our CI server. I've installed .NET 4.0, and the .NET tools from the Windows 7.1 SDK. 7 A...