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Is “double hashing” a password less secure than just hashing it once?
Is hashing a password twice before storage any more or less secure than just hashing it once?
16 Answers
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Sort a Custom Class List
I would like to sort my list with the date property.
10 Answers
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SQL join: selecting the last records in a one-to-many relationship
Suppose I have a table of customers and a table of purchases. Each purchase belongs to one customer. I want to get a list of all customers along with their last purchase in one SELECT statement. What is the best practice? Any advice on building indexes?
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Do you get charged for a 'stopped' instance on EC2? [closed]
Bit confused here, I have an on-demand instance but do I get charged even when I stop the instance?
4 Answers
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EC2 instance has no public DNS
A guy I work with gave me the EC2 credentials to log onto his EC2 console. I was not the one who set it up. Some of the instances show a public dns name and others have a blank public DNS. I want to be able to connect to the instances that have a blank public DNS. I have not been able to figure out ...
Extract part of a regex match
I want a regular expression to extract the title from a HTML page. Currently I have this:
8 Answers
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How to hide a in a menu with CSS?
I've realized that Chrome, it seems, will not allow me to hide <option> in a <select> . Firefox will.
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Why java.util.Optional is not Serializable, how to serialize the object with such fields
The Enum class is Serializable so there is no problem to serialize object with enums. The other case is where class has fields of java.util.Optional class. In this case the following exception is thrown: java.io.NotSerializableException: java.util.Optional
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How to parse a date? [duplicate]
I am trying to parse this date with SimpleDateFormat and it is not working:
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Check variable equality against a list of values
I'm checking a variable, say foo , for equality to a number of values. For example,
13 Answers
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