大约有 15,000 项符合查询结果（耗时：0.0254秒） [XML]
Is there a rule-of-thumb for how to divide a dataset into training and validation sets?
Is there a rule-of-thumb for how to best divide data into training and validation sets? Is an even 50/50 split advisable? Or are there clear advantages of having more training data relative to validation data (or vice versa)? Or is this choice pretty much application dependent?
...
Getting a random value from a JavaScript array
... one-liner
const randomElement = array[Math.floor(Math.random() * array.length)];
Example
const months = ["January", "February", "March", "April", "May", "June", "July"];
const random = Math.floor(Math.random() * months.length);
console.log(random, months[random]);
...
Why / when would it be appropriate to override ToString?
I'm studying C# and I wonder what the point and benefit of overriding ToString might be, as shown in the example below.
1...
How to set the java.library.path from Eclipse
How can I set the java.library.path for a whole Eclipse Project? I'm using a Java library that relies on OS specific files and need to find a .dll/ .so/ .jnilib . But the Application always exits with an error message that those files are not found on the library path.
...
Background color of text in SVG
I want to color the background of svg text similar to background-color in css
11 Answers
...
how to override action bar back button in android?
...ide
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
Toast.makeText(getApplicationContext(),"Back button clicked", Toast.LENGTH_SHORT).show();
break;
}
return true;
}
...
How do you specify a byte literal in Java?
...
You cannot. A basic numeric constant is considered an integer (or long if followed by a "L"), so you must explicitly downcast it to a byte to pass it as a parameter. As far as I know there is no shortcut.
sh...
java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
...
I had a similar problem when running a spring web application in an Eclipse managed tomcat. I solved this problem by adding maven dependencies in the project's web deployment assembly.
Open the project's properties (e.g., right-click on the project's name i...
Postgres could not connect to server
After I did brew update and brew upgrade, my postgres got some problem. I tried to uninstall postgres and install again, but it didn't work as well.
...
What causes javac to issue the “uses unchecked or unsafe operations” warning
...
This comes up in Java 5 and later if you're using collections without type specifiers (e.g., Arraylist() instead of ArrayList<String>()). It means that the compiler can't check that you're using the collection in a type-safe way, using generics.
To get rid of the w...