大约有 7,700 项符合查询结果（耗时：0.0253秒） [XML]
RGB to hex and hex to RGB
How to convert colors in RGB format to hex format and vice versa?
50 Answers
50
...
How to handle floats and decimal separators with html5 input type number
... pattern attribute
With the pattern attribute you can specify the allowed format with a regular expression in a HTML5 compatible way. Here you could specify that the comma character is allowed and a helpful feedback message if the pattern fails.
<input type="number" pattern="[0-9]+([,\.][0-9]+...
What is `params.require(:person).permit(:name, :age)` doing in Rails 4?
...are passed into the model.
It looks a lot like the whitelisting that was formerly included in ActiveRecord models, but it makes more sense for it to be in the controller.
share
|
improve this answ...
How and where are Annotations used in Java?
...s used to describe the element and clarify its meaning.
Prior to JDK5, information that is now expressed with annotations needed to be stored somewhere else, and XML files were frequently used. But it is more convenient to use annotations because they will belong to the Java code itself, and are h...
How to load JAR files dynamically at Runtime?
...
You should take a look at OSGi, e.g. implemented in the Eclipse Platform. It does exactly that. You can install, uninstall, start and stop so called bundles, which are effectively JAR files. But it does a little more, as it offers e.g. services that can be dynamically discovered in JAR files ...
How can I add a key/value pair to a JavaScript object?
...e3";
Using square bracket notation:
obj["key3"] = "value3";
The first form is used when you know the name of the property. The second form is used when the name of the property is dynamically determined. Like in this example:
var getProperty = function (propertyName) {
return obj[propertyN...
What does dot (.) mean in a struct initializer?
...
Note that I just tried this "dot initialization" type form for C++ using gcc, and it appears that all versions of gcc C++ support it, so I bet it's supported by gcc as a gcc extension, meaning that prior to C++20 I suspect it is not portable necessarily to non-gcc/g++ compilers....
Naming of enums in Java: Singular or Plural?
... day;
public void setDay(Day day) {
this.day = day;
}
}
In singular form you see clearly the intention of the day attribute. "day" its the day of the week this appointment is going to be held. Otherwise the signature of the method would have been setDay(Days day) and for sure a lot of people ...
Is floating point math broken?
... standard. The crux of the problem is that numbers are represented in this format as a whole number times a power of two; rational numbers (such as 0.1, which is 1/10) whose denominator is not a power of two cannot be exactly represented.
For 0.1 in the standard binary64 format, the representation ...
NUnit vs. MbUnit vs. MSTest vs. xUnit.net [closed]
...ose attributes decorate should be executed. While xUnit.NET in its default form allows you to write test classes that are similar to NUnit test fixtures with their test methods, you are not confined to this form of unit testing at all. You are free to extend the framework to support BDD-style Concer...