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Rails create or update magic?
...d. If an object is found it will update it, otherwise it will create a new one.
7 Answers
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What is an unsigned char?
...numeric type is required to cover. sizeof (char) is required to be 1 (i.e. one byte), but a byte could in theory be for example 32 bits. sizeof would still be report its size as 1 - meaning that you could have sizeof (char) == sizeof (long) == 1.
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How to write to an existing excel file without overwriting data (using pandas)?
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This solution works fine. It has one drawback though. It breaks formulas and connections within the spreadsheet. Any ideas how to change this behaviour?
– BP_
Nov 27 '13 at 15:18
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Map vs Object in JavaScript
...use it ensures the same performance in all browsers. So to me that's a big one.
The myMap.has(key) method will be especially handy, and also the myMap.size property.
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Is quitting an application frowned upon?
...hey think about "terminating" a Web page or "terminating" a thermostat.
iPhone users are much the same way, in that pressing the iPhone button does not necessarily "feel" like the app was terminated since many iPhone apps pick up where the user left off, even if the app really was shut down (since i...
How do I iterate over the words of a string?
..., "\n"));
}
Instead of copying the extracted tokens to an output stream, one could insert them into a container, using the same generic copy algorithm.
vector<string> tokens;
copy(istream_iterator<string>(iss),
istream_iterator<string>(),
back_inserter(tokens));
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What is a “batch”, and why is GO used?
... to separate each country code into a separate transaction - which can be done by separating them on the client with go.
Some SQL statements MUST be separated by GO from the following ones in order to work.
For example, you can't drop a table and re-create the same-named table in a single transacti...
How to create unit tests easily in eclipse [closed]
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@TheresaForster Which one you like? This answer or the one given by fastcodejava?
– javaguy
Dec 18 '11 at 22:44
2
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Why does integer division in C# return an integer and not a float?
Does anyone know why integer division in C# returns an integer and not a float?
What is the idea behind it? (Is it only a legacy of C/C++?)
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How to implement the activity stream in a social network
... last X items
Redis is fast and offers a way to pipeline commands across one connection - so pushing an activity out to 1000 friends takes milliseconds.
For a more detailed explanation of what I am talking about, see Redis' Twitter example: http://redis.io/topics/twitter-clone
Update February 20...