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Why does sed not replace all occurrences?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Dynamic SELECT TOP @var In SQL Server
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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How do you make a deep copy of an object?
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You can do a serialization-based deep clone using org.apache.commons.lang3.SerializationUtils.clone(T) in Apache Commons Lang, but be careful—the performance is abysmal.
In general, it is best practice to write your own clone methods for each class ...
How do I expire a PHP session after 30 minutes?
... and not the last access date:
Note: If you are using the default file-based session handler, your filesystem must keep track of access times (atime). Windows FAT does not so you will have to come up with another way to handle garbage collecting your session if you are stuck with a FAT filesyste...
Flask-SQLalchemy update a row's information
...ry.get(5)
user.name = 'New Name'
db.session.commit()
Flask-SQLAlchemy is based on SQLAlchemy, so be sure to check out the SQLAlchemy Docs as well.
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__lt__ instead of __cmp__
...ust __lt__ and multiply inherit from ComparableMixin (after whatever other bases it needs, if any). A class decorator would be quite similar, just inserting similar functions as attributes of the new class it's decorating (the result might be microscopically faster at runtime, at equally minute cost...
AngularJS : Factory and Service? [duplicate]
...ariable. Because service will create instance by default and use that as a base object.
myApp.service('myService', function () {
// any logic here..
this.name = 'Joe';
}
Actual angularjs code behind the service
function service(name, constructor) {
return factory(name, ['$injector', f...
Best way to list files in Java, sorted by Date Modified?
...re first. My solution was to call File.listFiles and just resort the list based on File.lastModified, but I was wondering if there was a better way.
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Is String.Contains() faster than String.IndexOf()?
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My answer is 7 years old and based on the .NET 2 framework. Version 4 IndexOf() does indeed use StringComparison.CurrentCulture and Contains() uses StringComparison.Ordinal which will be faster. But really the speed differences we're talking about are mi...
How to generate a number of most distinctive colors in R?
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You can use colorRampPalette from base or RColorBrewer package:
With colorRampPalette, you can specify colours as follows:
colorRampPalette(c("red", "green"))(5)
# [1] "#FF0000" "#BF3F00" "#7F7F00" "#3FBF00" "#00FF00"
You can alternatively provide hex cod...