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What is the best way to do a substring in a batch file?
...nced.
You can now use the following optional
syntax:
%~I - expands %I removing any surrounding quotes (")
%~fI - expands %I to a fully qualified path name
%~dI - expands %I to a drive letter only
%~pI - expands %I to a path only
%~nI - expands %I to a file na...
Getting time elapsed in Objective-C
...e time elapsed between two events, for example, the appearance of a UIView and the user's first reaction.
7 Answers
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How to get the original value of an attribute in Rails
...ibute will give you the previous value.
For rails 5.1+
Copied from Lucas Andrade's answer below: https://stackoverflow.com/a/50973808/9359123
Appending _was is deprecated in rails 5.1, now you should append _before_last_save
Something like:
before_save object
do_something_with object.name_...
Writing/outputting HTML strings unescaped
... or any other type that implements IHtmlString in model or directly inline and use regular @:
@{ var myHtmlString = new HtmlString(mystring);}
@myHtmlString
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Display / print all rows of a tibble (tbl_df)
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if you want don't want to worry about the value of n and you're already piping, you can use df %>% tbl_df %>% print(n = nrow(.))
– ClaytonJY
Aug 3 '16 at 15:57
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How to implement a Map with multiple keys? [duplicate]
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Two maps. One Map<K1, V> and one Map<K2, V>. If you must have a single interface, write a wrapper class that implements said methods.
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How can I discover the “path” of an embedded resource?
...tility
{
/// <summary>
/// Takes the full name of a resource and loads it in to a stream.
/// </summary>
/// <param name="resourceName">Assuming an embedded resource is a file
/// called info.png and is located in a folder called Resources, it
/// will be co...
Why does DEBUG=False setting make my django Static Files Access fail?
...trouble started sneaking in the moment I wanted to render my own beautiful and custom 404.html and 500.html pages.
14 Answe...
Pretty print in MongoDB shell as default
...o to pretty print output? Currently, everything is output to a single line and it's difficult to read, especially with nested arrays and documents.
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Does every Javascript function have to return a value?
...-like comments to each function, I write. So I begin each of it with /** and then I press Enter to let Netbeans fulfill default comment scheme for following function.
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