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What are the options for storing hierarchical data in a relational database? [closed]
...he hierarchy.
The problem up until now has been that the coversion method from an Adjacecy List to Nested Sets has been frightfully slow because most people use the extreme RBAR method known as a "Push Stack" to do the conversion and has been considered to be way to expensive to reach the Nirvana o...
Parcelable encountered IOException writing serializable object getactivity()
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@user2896762: In general, on Android, start from the bottom of the stack trace and work your way up to the last Caused by line. That's usually going to point to the specific problem. All the other stanzas of the stack trace represent wrapped exceptions around the "real...
Check if a String contains numbers Java
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To explain: .* means any character from 0 to infinite occurence, than the \\d+ (double backslash I think is just to escape the second backslash) and \d+ means a digit from 1 time to infinite.
– Giudark
Sep 29 '16 at 0:11
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How to view corresponding SQL query of the Django ORM's queryset?
...er level
# logs to console. All other loggers inherit settings from
# root level logger.
'handlers': ['console'],
'level': 'DEBUG',
'propagate': False, # this tells logger to send logging message
# to its par...
Difference between Inheritance and Composition
...ill need do a babysit for example now super class X change the method name from do to doing....then sub class Y will also need to be maintained (needs to be changed as well) this is still tight coupling? And how do we get rid of it?
– stuckedoverflow
Nov 4 '18 ...
ab load testing
...g: it indicates that you desire for your test to use the Keep Alive header from HTTP and sustain the connection). Since browsers do this and you're likely to want to simulate the stress and flow that your site will have from browsers, it is recommended you do a benchmark with this.
The final argume...
Difference between Visual Basic 6.0 and VBA
... your project. You'll also not be able to create COM DLLs with VBA.
Apart from that, there is a difference in the IDE - the VB 6.0 IDE is more powerful in comparison. On the other hand, you have tight integration of the host application in VBA. Application-global objects (like "ActiveDocument") and...
Why java.util.Optional is not Serializable, how to serialize the object with such fields
... (such as the getValue method in the question) returns the actual Optional from the field, it forces every caller to implement some policy for dealing with an empty value. This will likely lead to inconsisent behavior across callers. It's often better to have whatever code sets that field apply some...
What are the differences between a HashMap and a Hashtable in Java?
...ency). Bottom line: the only reason to use Hashtable is when a legacy API (from ca. 1996) requires it.
– erickson
Mar 16 '12 at 17:19
8
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PHP YAML Parsers [closed]
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There are other lesser known libraries (like this one, from the Horde project), but I didn't want to delve much into these.
– NullUserException
Sep 11 '10 at 16:47
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