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Blocks and yields in Ruby
...trary segments of code.
When a method expects a block, it invokes it by calling the yield function.
This is very handy, for instance, to iterate over a list or to provide a custom algorithm.
Take the following example:
I'm going to define a Person class initialized with a name, and provide a ...
Creating a new column based on if-elif-else condition
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Zelazny7Zelazny7
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When do you use POST and when do you use GET?
... POST action in the address bar of your browser. Use GET when it's safe to allow a person to call an action. So a URL like:
http://myblog.org/admin/posts/delete/357
Should bring you to a confirmation page, rather than simply deleting the item. It's far easier to avoid accidents this way.
POST is...
How to iterate through a DataTable
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foreach (DataRow row in myDataTable.Rows)
{
Console.WriteLine(row["ImagePath"]);
}
I am wr...
How to list only top level directories in Python?
...use:
os.walk('.').next()[1]
How this works
os.walk is a generator and calling next will get the first result in the form of a 3-tuple (dirpath, dirnames, filenames). Thus the [1] index returns only the dirnames from that tuple.
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Setting individual axis limits with facet_wrap and scales = “free” in ggplot2
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I am not sure I understand what you want, but based on what I understood
the x scale seems to ...
Java 8 functional interface with no arguments and no return value
...k method would have been nice. EDIT: Oops: stackoverflow.com/questions/27973294/…
– jpangamarca
Aug 19 '15 at 15:46
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Pushing empty commits to remote
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yamafontesyamafontes
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How to stop event bubbling on checkbox click
...se the method
isDefaultPrevented to know whether
this method was ever called (on that
event object).
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Android: “Path for project must have only one segment”
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Android EveAndroid Eve
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