大约有 42,000 项符合查询结果（耗时：0.0580秒） [XML]
Which is fastest? SELECT SQL_CALC_FOUND_ROWS FROM `table`, or SELECT COUNT(*)
When you limit the number of rows to be returned by a SQL query, usually used in paging, there are two methods to determine the total number of records:
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How to round up to the nearest 10 (or 100 or X)?
I am writing a function to plot data. I would like to specify a nice round number for the y-axis max that is greater than the max of the dataset.
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Removing colors from output
I have some script that produces output with colors and I need to remove the ANSI codes.
13 Answers
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What is MOJO in Maven?
I'm reading about Maven right now and everywhere in a text I see this word (mojo). I approximately understand what it means, but I would not refuse from a good explanation. I tried to google, but found only non-maven explanations.
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How can I remove specific rules from iptables?
I am hosting special HTTP and HTTPS services on the ports 8006 and 8007 respectively. I use iptables to "activate" the server; i.e. to route the incoming HTTP and HTTPS ports:
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Declaring javascript object method in constructor function vs. in prototype [duplicate]
In creating javascript objects, I can put a method declaration either in the constructor function or in the prototype. For example, say I want a Dog class that has a Name property and a Bark method. I can put the declaration of the Bark method into the constructor function:
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What does the tilde before a function name mean in C#?
I am looking at some code and it has this statement:
6 Answers
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Memory footprint of Haskell data types
How can I find the actual amount of memory required to store a value of some data type in Haskell (mostly with GHC)? Is it possible to evaluate it at runtime (e.g. in GHCi) or is it possible to estimate memory requirements of a compound data type from its components?
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Check if table exists without using “select from”
Is there a way to check if a table exists without selecting and checking values from it?
17 Answers
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Domain Driven Design: Domain Service, Application Service
Can someone explain the difference between domain and application services by providing some examples? And, if a service is a domain service, would I put the actual implementation of this service within the domain assembly and if so, would I also inject repositories into that domain service? Some in...