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Insert into a MySQL table or update if exists

... I know all of you allude to this, but I want to be explicit for others. If the ID you insert is NOT the PRIMARY KEY or UNIQUE, then this will not work. This didn't initially work for me because my ID was not unique. ...
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How do I determine whether my calculation of pi is accurate?

...various methods to implement a program that gives the digits of pi sequentially. I tried the Taylor series method, but it proved to converge extremely slowly (when I compared my result with the online values after some time). Anyway, I am trying better algorithms. ...
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SQL (MySQL) vs NoSQL (CouchDB) [closed]

...e responsible for a lot of work that the system takes care of automatically in a relational database system. Similar to what happens when you pick manual over automatic transmission. Secondly, NoSQL allows you to eke more performance out of the system by eliminating a lot of integrit...
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Android device chooser - My device seems offline

...n application and i was planning to deploy it to my HTC Desire. I have installed USB driver. I turned on USB debugging on the phone and choosed charge only when phone plugged-in. When I run application Android device chooser show my device offline. I am stuck at this point. Any help would be appreci...
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Solution for “Fatal error: Maximum function nesting level of '100' reached, aborting!” in PHP

I have made a function that finds all the URLs within an html file and repeats the same process for each html content linked to the discovered URLs. The function is recursive and can go on endlessly. However, I have put a limit on the recursion by setting a global variable which causes the recursion...
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How do I fetch a single model in Backbone?

... @SimplGy that works because model.id is essentially synonymous with model.attributes.id. If you call model.set('id'), Backbone sets model.id to whatever you specified. And model.id is what gets used when creating the model-specific URL. – Lambart ...
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What is the opposite of :hover (on mouse leave)?

...{ color:#999; transition: color 0.5s linear; /* vendorless fallback */ -o-transition: color 0.5s linear; /* opera */ -ms-transition: color 0.5s linear; /* IE 10 */ -moz-transition: color 0.5s linear; /* Firefox */ -webkit-transition: color 0.5s linear; /*safari and chr...
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You have not concluded your merge (MERGE_HEAD exists)

I made a branch called 'f' and did a checkout to master. When I tried the git pull command I got this message: 13 Answers...
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Skip first entry in for loop in python?

... Not for all iterables, but for all sequences. – Sven Marnach Apr 9 '12 at 20:27 2 ...
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Getting jQuery to recognise .change() in IE

...Pacifika: Not for me in IE7. At least it gets that right. "click" is a totally different event from "change" and there are at least some cases (if not all) where it's an inappropriate substitute. – Bobby Jack Jul 9 '09 at 11:27 ...