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Java: Literal percent sign in printf statement
I'm trying to add an actual percent sign into a printf statement in Java and I'm getting the error:
3 Answers
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In which case do you use the JPA @JoinTable annotation?
...ble or @JoinColumn
Let's pretend that you have an entity named Project and another entity named Task and each project can have many tasks.
You can design the database schema for this scenario in two ways.
The first solution is to create a table named Project and another table named Task and ad...
Make maven's surefire show stacktrace in console
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You can use the following command to see the stack trace on console instead of report files in the target/surefire-reports folder:
mvn -Dsurefire.useFile=false test
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Scale Image to fill ImageView width and keep aspect ratio
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Without using any custom classes or libraries:
<ImageView
android:id="@id/img"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:scaleType="fitCenter" />
scaleType="fitCenter" (default when omitted)
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Can I create a named default constraint in an add column statement in SQL Server?
...thDoctor That makes no sense. The NOT NULL is not part of the constraint and the drop statement just references the constraint name
– Roger Willcocks
Mar 29 '16 at 0:07
11
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Ruby on Rails: getting the max value from a DB column
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Assuming your model name is Bar and it has a column named bar, this should work:
Bar.maximum("bar")
See the excellent Rails Guides section on Calculations for more info.
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Can Rails Routing Helpers (i.e. mymodel_path(model)) be Used in Models?
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In Rails 3, 4, and 5 you can use:
Rails.application.routes.url_helpers
e.g.
Rails.application.routes.url_helpers.posts_path
Rails.application.routes.url_helpers.posts_url(:host => "example.com")
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Hash function that produces short hashes?
Is there a way of encryption that can take a string of any length and produce a sub-10-character hash? I want to produce reasonably unique ID's but based on message contents, rather than randomly.
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Cannot set boolean values in LocalStorage?
...e, as written in the description of Equal (==) in MDC*:
If the two operands are not of the same type, JavaScript converts the operands then applies strict comparison. If either operand is a number or a boolean, the operands are converted to numbers if possible; else if either operand is a string...
Import existing source code to GitHub
...itbucket/github, then push up your source)
Create the remote repository, and get the URL such as git@github.com:/youruser/somename.git or https://github.com/youruser/somename.git
If your local GIT repo is already set up, skips steps 2 and 3
Locally, at the root directory of your source, git ini...