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Rails :include vs. :joins
...ment belongs_to a User.
The User model has the following attributes: Name(string), Age(integer). The Comment model has the following attributes:Content, user_id. For a comment a user_id can be null.
Joins:
:joins performs a inner join between two tables. Thus
Comment.joins(:user)
#=> <A...
Why should I avoid std::enable_if in function signatures
...lity: constructors don't have return types, and some operators cannot have extra arguments, so neither of the other two options can be applied everywhere. Putting enable_if in a template parameter works everywhere since you can only use SFINAE on templates anyway.
For me, the readability aspect is...
How to tell if JRE or JDK is installed
...an be inferred (most of the time)...
public static boolean isJDK() {
String path = System.getProperty("sun.boot.library.path");
if(path != null && path.contains("jdk")) {
return true;
}
return false;
}
However... on Linux this isn't as reliable... For example...
...
What is the most effective way for float and double comparison?
... in my code, difference between the original expected value and the parsed string.
– mwpowellhtx
Jan 20 '19 at 17:31
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show 1 more comment
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Remove duplicates from an array of objects in JavaScript
...ueArray = things.thing.filter((thing, index) => {
const _thing = JSON.stringify(thing);
return index === things.thing.findIndex(obj => {
return JSON.stringify(obj) === _thing;
});
});
Stackblitz Example
sha...
Best approach to converting Boolean object to string in java
I am trying to convert boolean to string type...
7 Answers
7
...
Explain the concept of a stack frame in a nutshell
... instructions to save, set up and restore frame pointers; it also makes an extra register available in many functions)
Intel C++ Compiler have the following:
-fomit-frame-pointer (Determines whether EBP is used as a general-purpose register in optimizations)
which has the following alias:
/O...
How to construct a REST API that takes an array of id's for the resources
...cate query parameters will be combined into an array. With the above query string, PHP happens to tell you that id equals [1, 2, 3], but Ruby on Rails tells you it equals 3, and other frameworks may also act differently, e.g. saying id equals 1. URLs like …?id=1,2,3 avoid this potential for confus...
Dictionary returning a default value if the key does not exist [duplicate]
... trygetvalue doesn't allow you to specify a default value, ie for a string value you may want it to return "" instead of null
– katbyte
Aug 12 '13 at 20:08
1
...
Exception messages in English?
...er(@"c:\does-not-exist");
}
catch(Exception ex)
{
Console.WriteLine(ex.ToString()); //Will display localized message
ExceptionLogger el = new ExceptionLogger(ex);
System.Threading.Thread t = new System.Threading.Thread(el.DoLog);
t.CurrentUICulture = new System.Globalization.CultureInfo("en-...