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How can I determine if a JavaScript variable is defined in a page? [duplicate]

... To avoid accidental assignment, I make a habit of reversing the order of the conditional expression: if ('undefined' !== typeof x) { share | improve this answer | ...
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Best general SVN Ignore Pattern?

... Of course, the usual pattern of *.bin *.bak *.pdb *.suo etc etc must be set up front, I agree. But once you set the ignore properties on a repository folder, they do effectively become shared - although I am aware this is not exactly what you meant. – petr k....
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What's the difference between “Layers” and “Tiers”?

...ensitive code (real business code - business layer, database access layer, etc.). There are so many benefits to implement a layered architecture. This is tricky and properly implementing a layered application takes time. If you have some, have a look at this post from Microsoft: http://msdn.micro...
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How can I color Python logging output?

...ndlers or propagated to other loggers. If you have configured file loggers etc. you probably don't want to have the colors in the log files. To avoid that, it's probably best to simply create a copy of record with copy.copy() before manipulating the levelname attribute, or to reset the levelname to ...
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How do you log server errors on django sites

...hatever type of logging you'd like: writing to console, writing to a file, etc., etc. Edit: though it's a bit less useful, you can also listen for the got_request_exception signal, which will be sent whenever an exception is encountered during request processing: http://docs.djangoproject.com/en/d...
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What's the difference between the Dependency Injection and Service Locator patterns?

...to have a central location for common dependencies (e.g. settings, logger, etc). Given a class using such deps, you can create a "real" constructor that receives the deps, and a default (no parameter) constructor that retrieves from the SL and forwards to the "real" constructor. EDIT: and, of cours...
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How to place two divs next to each other?

...ng issue: since divs are made inline you have to keep no spaces, new lines etc between them in your HTML. Otherwise, browsers will render a space between them. See this Fiddle: you can't manage to keep both divs on the same line unless you put theirs tags without anything in between. ...
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MySQL - why not index every field?

...he line, that depends on how the data is being acessed (sorting filtering, etc.). share | improve this answer | follow | ...
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Why do we use arrays instead of other data structures?

... at most two children. You can have a binary tree with the elements in any order. The binary search tree is organized as you describe. – gnud Jan 2 '09 at 20:37 1 ...
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How to modify the keyboard shortcuts in Eclipse IDE?

... less says it all. Specifically, I've become increasingly annoyed that in order to run an ant script I have to use Alt + Shift + x , q . But I think If I had this power I would many things I would change the shortcuts for/add shortcuts for things that don't currently have them. ...