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Memcache(d) vs. Varnish for speeding up 3 tier web architecture

I'm trying to speed up my benchmark (3 tier web architecture), and I have some general questions related to Memcache(d) and Varnish. ...
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Entity Framework: “Store update, insert, or delete statement affected an unexpected number of rows (

... telling you is that between when you grabbed the data out of the database and when you saved your changes someone else has changed the data (Which meant when you went to save it 0 rows actually got updated). In SQL terms, their update query's where clause contains the original value of every field ...
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How do I remove objects from a JavaScript associative array?

...tances of Array, if you do not want to create a sparsely populated array - and you usually don't - then you should use Array#splice or Array#pop. Note that the delete operator in JavaScript does not directly free memory. Its purpose is to remove properties from objects. Of course, if a property bei...
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Search for “does-not-contain” on a DataFrame in pandas

I've done some searching and can't figure out how to filter a dataframe by df["col"].str.contains(word) , however I'm wondering if there is a way to do the reverse: filter a dataframe by that set's compliment. eg: to the effect of !(df["col"].str.contains(word)) . ...
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How do I enable/disable log levels in Android?

... A common way is to make an int named loglevel, and define its debug level based on loglevel. public static int LOGLEVEL = 2; public static boolean ERROR = LOGLEVEL > 0; public static boolean WARN = LOGLEVEL > 1; ... public static boolean VERBOSE = LOGLEVEL > 4; ...
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How to add an Access-Control-Allow-Origin header

I am designing a website (e.g. mywebsite.com) and this site loads font-face fonts from another site (say anothersite.com). I was having problems with the font face font loading in Firefox and I read on this blog : ...
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Postgres: SQL to list table foreign keys

...to list all foreign keys for a given table? I know the table name / schema and I can plug that in. 23 Answers ...
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When should I use Memcache instead of Memcached?

It seems that PHP has two memcached libraries named memcache and memcached . What is the difference and how do you know which one to use? Is one outdated? It seems that memcached offers more methods so I would assume that means it has had the most development - but it also seems to require exter...
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What is the preferred syntax for initializing a dict: curly brace literals {} or the dict() function

I'm putting in some effort to learn Python, and I am paying close attention to common coding standards. This may seem like a pointlessly nit-picky question, but I am trying to focus on best-practices as I learn, so I don't have to unlearn any 'bad' habits. ...
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Android customized button; changing text color

...button, just like you did for background, for example: <selector xmlns:android="http://schemas.android.com/apk/res/android"> <!-- Focused and not pressed --> <item android:state_focused="true" android:state_pressed="false" android:color="#ffffff" /> ...