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Run a single migration file

...f the ruby file: rails console >> require "db/migrate/20090408054532_add_foos.rb" >> AddFoos.up Note: newer versions of rails may require AddFoos.new.up rather than AddFoos.up. An alternative way (without IRB) which relies on the fact that require returns an array of class names: sc...
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Add Variables to Tuple

... >>> from dis import dis >>> dis(f) 2 0 LOAD_CONST 1 (('foo', 'bar')) 2 STORE_FAST 0 (tuple1) 3 4 LOAD_FAST 0 (tuple1) 6 LOAD_CONST 3 (('baz',)) 8 BUILD_TUPL...
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Safari 3rd party cookie iframe trick no longer working?

...back to facebook. Add this code in the top of your index.php and set $page_url to your application final tab/app URL and you’ll see your application will work without any problem. <?php // START SAFARI SESSION FIX session_start(); $page_url = "http://www.facebook.com/pages/.../......
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Leading zeros for Int in Swift

...wn below in order to solve your problem. #1. Using String's init(format:_:) initializer Foundation provides Swift String a init(format:_:) initializer. init(format:_:) has the following declaration: init(format: String, _ arguments: CVarArg...) Returns a String object initialized by using ...
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Hidden features of Perl?

... Cool! !!$undef_var doesn't create a warning. – Axeman Oct 2 '08 at 20:40 4 ...
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What do linkers do?

..., let's study a NASM x86-64 ELF Linux hello world: section .data hello_world db "Hello world!", 10 section .text global _start _start: ; sys_write mov rax, 1 mov rdi, 1 mov rsi, hello_world mov rdx, 13 syscall ; sys_exit ...
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Swift: #warning equivalent

...mple all at the same time. // Description of what you need to fix var FIX_ME__????????????: AnyObject Throws a warning that 'FIX_ME__????????????' was never used. You can add emoticons to the variable name if you like... I often use ???? and ????, for something that really needs fixing I'd eve...
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Getting All Variables In Scope

...omething along the lines of what KennyTM pointed out (for (var propName in ____)) since that will tell you what's available on various objects provided to you (this and arguments; if you're not sure what arguments they give you, you can find out via the arguments variable that's implicitly defined f...
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Are duplicate keys allowed in the definition of binary search trees?

...about them. As just a starter, take a look here: en.wikipedia.org/wiki/List_of_data_structures#Trees – Andrew Sep 16 at 0:52 add a comment  |  ...
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Convert SVG image to PNG with PHP

...ck: $usmap = '/path/to/blank/us-map.svg'; $im = new Imagick(); $svg = file_get_contents($usmap); /*loop to color each state as needed, something like*/ $idColorArray = array( "AL" => "339966" ,"AK" => "0099FF" ... ,"WI" => "FF4B00" ,"WY" => "A3609B" ); foreach($i...