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What's the difference between the build and create methods in FactoryGirl?

...ting to DB makes testing time consuming. e.g. I create users to authentication with create() because my authentication engine queries the DB. To check if a model has an attribute the build() method will do because no DB access is required. it{Factory.build(:user).should respond_to(:name)} Upd...
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How long is the SHA256 hash?

... A sha256 is 256 bits long -- as its name indicates. Since sha256 returns a hexadecimal representation, 4 bits are enough to encode each character (instead of 8, like for ASCII), so 256 bits would represent 64 hex characters, therefore you need a varchar(64), or even a ...
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initializing a boolean array in java

... based. The freq[Global.iParameter[2]] = false; line as you've there would cause ArrayIndexOutOfBoundsException. To learn more about arrays in Java, consult this basic Oracle tutorial. share | impro...
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NSLog/printf specifier for NSInteger?

... Updated answer: You can make use of the z and t modifiers to handle NSInteger and NSUInteger without warnings, on all architectures. You want to use %zd for signed, %tu for unsigned, and %tx for hex. This information comes courtesy of Greg Par...
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How to “pull” from a local branch into another one?

This sounds so simple, but I just can't figure it out. I made an experimental branch a while ago, and now I'd like to pull in all the changes that happened on master since I made it. This is all local. I want to pull from local master into local my_branch, but I can't do it. This doesn't seem to wor...
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List Git aliases

...es, append | sort just before the closing double-quote. Alternatively, you can keep the aliases in ~/.gitconfig sorted. To add the alias as a system-wide alias, replace --global (for current user) with --system (for all users). This typically goes in the /etc/gitconfig file. ...
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UITableView with fixed section headers

...le. It is recommended that you use initWithStyle:UITableViewStylePlain, as calling something like tableView.style = UITableViewStylePlain will not work. – bachonk Jun 10 '14 at 16:35 ...
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How do I remove all HTML tags from a string without knowing which tags are in it?

... You can use a simple regex like this: public static string StripHTML(string input) { return Regex.Replace(input, "<.*?>", String.Empty); } Be aware that this solution has its own flaw. See Remove HTML tags in String f...
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Merge git repo into branch of another repo

...repo Bar. I want to merge Bar with Foo, but only into a separate branch, called baz . 3 Answers ...
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Access to Modified Closure (2)

....Click += new EventHandler(delegate { MessageBox.Show(tmp); }); } Significantly, note that from C# 5 onwards, this has changed, and specifically in the case of foreach, you do not need to do this any more: the code in the question would work as expected. To show this not working without this chan...