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Why is there no Tree class in .NET?
... .NET has some excellent data structures for collections (List, Queue, Stack, Dictionary), but oddly enough it does not contain any data structures for binary trees. This is a terribly useful structure for certain algorithms, such as those that take advantage of different traversal paths. I'm lookin...
Format bytes to kilobytes, megabytes, gigabytes
...ed in a database as bytes. What's the best way to format this size info to kilobytes, megabytes and gigabytes? For instance I have an MP3 that Ubuntu displays as "5.2 MB (5445632 bytes)". How would I display this on a web page as "5.2 MB" AND have files less than one megabyte display as KB and files...
How to check if a Ruby object is a Boolean
I can't seem to check if an object is a boolean easily. Is there something like this in Ruby?
9 Answers
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How to use java.String.format in Scala?
...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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How can I measure the actual memory usage of an application or process?
...ages are shared, for example by several threads or by using dynamically linked libraries
If you really want to know what amount of memory your application actually uses, you need to run it within a profiler. For example, Valgrind can give you insights about the amount of memory used, and, more imp...
Adding a public key to ~/.ssh/authorized_keys does not log me in automatically
I added the public SSH key to the authorized_keys file. ssh localhost should log me in without asking for the password.
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Why does i = i + i give me 0?
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Louis WassermanLouis Wasserman
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Return None if Dictionary key is not available
I need a way to get a dictionary value if its key exists, or simply return None , if it does not.
11 Answers
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How do I remove a property from a JavaScript object?
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Like this:
delete myObject.regex;
// or,
delete myObject['regex'];
// or,
var prop = "regex";
delete myObject[prop];
Demo
var myObject = {
"ircEvent": "PRIVMSG",
"method": "newURI",
"regex": "^http://.*"
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How to calculate the running time of my program? [duplicate]
... answered Mar 5 '11 at 13:26
snakilesnakile
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