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How long should SQL email fields be? [duplicate]
...really long but do you really need worry about these long Email addresses? If someone can't login with a 100-char Email, do you really care? We actually prefer they can't.
Some statistical data may shed some light on the issue. We analyzed a database with over 10 million Email addresses. These addr...
How to replace list item in best way
...newValue = value.ToString();
int index = listofelements.IndexOf(oldValue);
if(index != -1)
listofelements[index] = newValue;
This asks only once for the index. Your approach uses Contains first which needs to loop all items(in the worst case), then you're using IndexOf which needs to enumerate...
How can I move a single directory from a git repository to a new repository whilst maintaining the h
...ll this whilst maintaining the revision history of the individual projects if possible.
3 Answers
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The default for KeyValuePair
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Try this:
if (getResult.Equals(new KeyValuePair<T,U>()))
or this:
if (getResult.Equals(default(KeyValuePair<T,U>)))
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Where is Maven' settings.xml located on mac os?
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If you use brew to install maven, then the settings file should be in
/usr/local/Cellar/maven/<version>/libexec/conf
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How does TransactionScope roll back transactions?
...base connections. When you open a DB connection the connections will looks if there is an ambient transaction (Transaction Scope) and if so enlist with it. Caution if there are more the one connection to the same SQL server this will escalate to a Distribtued Transaction.
What happens since you're...
Access key value from Web.config in Razor View-MVC3 ASP.NET
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What's the difference between @Anwar's answer and yours? Besides the naming ;)
– Nate-Wilkins
Oct 11 '13 at 16:40
21
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what's the difference between “hadoop fs” shell commands and “hdfs dfs” shell commands?
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Following are the three commands which appears same but have minute differences
hadoop fs {args}
hadoop dfs {args}
hdfs dfs {args}
hadoop fs <args>
FS relates to a generic file system which can point to any file systems like local, HDFS etc. So this can be used when you are d...
Is there a more elegant way of adding an item to a Dictionary safely?
... add key/object pairs to a dictionary, but I of course need to first check if the key already exists otherwise I get a " key already exists in dictionary " error. The code below solves this but is clunky.
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Is Java Regex Thread Safe?
...rrent threads. Instances of the Matcher class are not safe for such use.
If you are looking at performance centric code, attempt to reset the Matcher instance using the reset() method, instead of creating new instances. This would reset the state of the Matcher instance, making it usable for the n...