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How to get the first element of the List or Set? [duplicate]
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See the javadoc
of List
list.get(0);
or Set
set.iterator().next();
and check the size before using the above methods by invoking isEmpty()
!list_or_set.isEmpty()
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Error: Configuration with name 'default' not found in Android Studio
...ge you just need to run terminal command: ./gradlew assembleDebug. You can do it from Android Studio or an external terminal app.
– eleven
Apr 15 '15 at 12:40
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MySQL - UPDATE multiple rows with different values in one query
...to understand how to UPDATE multiple rows with different values and I just don't get it. The solution is everywhere but to me it looks difficult to understand.
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Better way to cast object to int
This is probably trivial, but I can't think of a better way to do it. I have a COM object that returns a variant which becomes an object in C#. The only way I can get this into an int is
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Putting HTML inside Html.ActionLink(), plus No Link Text?
...tion("Index", "Home")"><span>Text</span></a>
And to do a blank url you could have
<a href="<%= Url.Action("Index", "Home") %>"></a>
<a href="@Url.Action("Index", "Home")"></a>
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Hash String via SHA-256 in Java
... utility) to generate a SHA-256 Hash of a String in Java. Looking at their documentation I can't seem to find any good examples of what I want to do. Can anybody here help me out?
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Spring RestTemplate GET with parameters
...de().toUri(), String.class); for simplicity.
– Fernando M. Pinheiro
Nov 27 '15 at 0:48
13
@Fernan...
Remove not alphanumeric characters from string
... or it's coming from some kind of untrusted/misconfigured source - you can do something like this:
JSON.stringify("\\test\red\bob\fred\new").replace(/\W/g, '')
"testredbobfrednew" // output
Note that the json representation of a string includes the quotes:
JSON.stringify("\\test\red\bob\fred\new...
rmagick gem install “Can't find Magick-config”
...talling the "libmagick9-dev library", however, I can not figure out how to do this.
25 Answers
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What's the difference between identifying and non-identifying relationships?
...s may be confusing because it's common practice these days to create a pseudokey for a child table, but not make the foreign key to the parent part of the child's primary key. Formally, the "right" way to do this is to make the foreign key part of the child's primary key. But the logical relations...