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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...
jQuery, get html of a whole element [duplicate]
...un when append is called. It might cause problems.
– Andrej
Feb 13 '14 at 16:17
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Python - Count elements in list [duplicate]
...ltin, but it takes a mysterious argument, doesn't return the right answer, and its documentation is hard to find.
– Reb.Cabin
Jul 21 '16 at 3:29
2
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Can we have multiline comments in a Java properties file?
...for properties files too like java/xml/jsp etc..
– spandey
Feb 12 '18 at 6:23
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matplotlib: colorbars and its text labels
... scheme
cMap = ListedColormap(['white', 'green', 'blue','red'])
#data
np.random.seed(42)
data = np.random.rand(4, 4)
fig, ax = plt.subplots()
heatmap = ax.pcolor(data, cmap=cMap)
#legend
cbar = plt.colorbar(heatmap)
cbar.ax.get_yaxis().set_ticks([])
for j, lab in enumerate(['$0$','$1$','$2$','$&g...
Getting associated type synonyms with template Haskell
Can Template Haskell find out the names and/or the declarations of the associated type synonyms declared in a type class? I expected reify would do what I want, but it doesn't seem to provide all the necessary information. It works for getting function type signatures:
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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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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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