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Understanding the Rails Authenticity Token
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What happens
When the user views a form to create, update, or destroy a resource, the Rails app creates a random authenticity_token, stores this token in the session, and places it in a hidden field in the form. When the user submits the form, Rails looks for t...
How to show git log history for a sub directory of a git repo?
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From directory foo/, use
git log -- A
You need the '--' to separate <path>.. from the <since>..<until> refspecs.
# Show changes for src/nvfs
$ git log --oneline -- src/nvfs
d6f6b3b Changes for Mac OS X
803fcc3 In...
A Java collection of value pairs? (tuples?)
...w Java has a Map where you can define the types of each entry in the map, for example <String, Integer> .
19 Answer...
How to change the decimal separator of DecimalFormat from comma to dot/point?
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You can change the separator either by setting a locale or using the DecimalFormatSymbols.
If you want the grouping separator to be a point, you can use an european locale:
NumberFormat nf = NumberFormat.getNumberInstance(Locale.GERMAN);
DecimalForm...
Open existing file, append a single line
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You can use File.AppendAllText for that:
File.AppendAllText(@"c:\path\file.txt", "text content" + Environment.NewLine);
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Position absolute but relative to parent
...lute;
top: 0;
}
#son2 {
position: absolute;
bottom: 0;
}
This works because position: absolute means something like "use top, right, bottom, left to position yourself in relation to the nearest ancestor who has position: absolute or position: relative."
So we make #father have position:...
angularjs directive call function specified in attribute and pass an argument to it
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Marko's solution works well.
To contrast with recommended Angular way (as shown by treeface's plunkr) is to use a callback expression which does not require defining the expressionHandler. In marko's example change:
In template
<div my-...
Simplest PHP example for retrieving user_timeline with Twitter API version 1.1
...tter API 1.0 retirement as of June 11th 2013 , the script below does not work anymore.
14 Answers
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Removing MySQL 5.7 Completely [closed]
...ckup of your needed databases with mysqldump
Note: If you want to restore later, just backup your relevant databases, and not the WHOLE, because the whole database might actually be the reason you need to purge and reinstall).
In total, do this:
sudo service mysql stop #or mysqld
sudo killa...
Is List a subclass of List? Why are Java generics not implicitly polymorphic?
I'm a bit confused about how Java generics handle inheritance / polymorphism.
17 Answers
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