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Run a single migration file
...t 8 years (I'm not sure what version) Rails added checks that prevent this from running if it has already been run. This is indicated by an entry in the schema_migrations table. To re-run it, simply execute rake db:migrate:redo VERSION=20090408054532 instead.
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Font Awesome not working, icons showing as squares
... with Amazon Cloudfront CDN but it got resolved after I started loading it from maxcdn
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get and set in TypeScript
...tion for the TypeScriptCompile build tool. You can see that here:
As @DanFromGermany suggests below, if your are simply reading and writing a local property like foo.bar = true, then having a setter and getter pair is overkill. You can always add them later if you need to do something, like loggi...
How do I delete an exported environment variable?
...enerally, each time a terminal window is opened, it will load up variables from various places such as ~/.bashrc, ~/.profile, etc. Any variables you set in one terminal instance will not carry over to another. If you have a variable which seems to be set automatically every time you open terminal, t...
What is the difference between char * const and const char *?
... @supercat (oh, C-only, sorry for the C++ code link, I got here from a C++ question) It's all about the C declaration syntax, with a ("pure") type part followed by a declarator. In "int const *foo, *volatile bar" the type part is int const (stops before the *) and the declarators are *foo...
How do I get the coordinates of a mouse click on a canvas element?
...6667/578749 that instead of event.pageX/Y, it subtracted calculated offset from event.clientX/Y. Could someone review this and explain?
– lvella
Jul 4 '13 at 19:41
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How to get index in Handlebars each helper?
...eration) is provided by default with the standard each helper.
snippet from : https://github.com/wycats/handlebars.js/issues/250#issuecomment-9514811
The index of the current array item has been available for some time now via @index:
{{#each array}}
{{@index}}: {{this}}
{{/each}}
For ob...
Javascript add leading zeroes to date
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Here is an example from the Date object docs on the Mozilla Developer Network using a custom "pad" function, without having to extend Javascript's Number prototype. The handy function they give as an example is
function pad(n){return n<10 ?...
How to add a vertical Separator?
...e so that all controls in one line are actually on one line. just a helper from vs2012. when i rotate the separator, i don't get these lines anymore.
– Martin Weber
Nov 27 '12 at 16:37
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How to list variables declared in script in bash?
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compgen -v
It lists all variables including local ones.
I learned it from Get list of variables whose name matches a certain pattern, and used it in my script.
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