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How to use java.String.format in Scala?
I am trying to use a .format method of a string. But if I place %1, %2, etc. in the string, java.util.UnknownFormatConversionException is thrown pointing to a confusing Java source code piece:
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What's the point of JAXB 2's ObjectFactory classes?
I'm new to using JAXB, and I used JAXB 2.1.3's xjc to generate a set of classes from my XML Schema. In addition to generating a class for each element in my schema, it created an ObjectFactory class.
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Double vs single quotes
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" " allows you to do string interpolation, e.g.:
world_type = 'Mars'
"Hello #{world_type}"
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How do you count the number of occurrences of a certain substring in a SQL varchar?
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20 Answers
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powershell 2.0 try catch how to access the exception
This is the try catch in PowerShell 2.0
1 Answer
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MSysGit vs. Git for Windows
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edited Feb 22 '15 at 15:48
Mark Amery
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Changing the color of the axis, ticks and labels for a plot in matplotlib
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answered Jan 21 '11 at 17:44
Joe KingtonJoe Kington
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What are database normal forms and can you give examples? [closed]
...ontain only one piece of information, and there can be no duplicate rows.
2NF and 3NF are all about being dependent on the primary key. Recall that a primary key can be made up of multiple columns. As Chris said in his response:
The data depends on the key [1NF], the whole key [2NF] and nothing bu...
搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...，那我们也按照这个数量配置测试。
1、准备两台机器 192.168.1.136、192.168.1.137、192.168.1.138。 192.168.1.136 当作副本集主节点，192.168.1.137、192.168.1.138作为副本集副本节点。
2、分别在每台机器上建立mongodb副本集测试文件夹
#存...
Difference between natural join and inner join
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One significant difference between INNER JOIN and NATURAL JOIN is the number of columns return...