大约有 43,000 项符合查询结果（耗时：0.0712秒） [XML]
Double exclamation points? [duplicate]
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This converts a value to a boolean and ensures a boolean type.
"foo" // Evaluates to "foo".
!"foo" // Evaluates to false.
!!"foo" // Evaluates to true.
If foo.bar is passed through, then it may not be 0 but some oth...
What is the difference between JSF, Servlet and JSP?
...st/response work from your hands, such as gathering user input, validating/converting them, putting them in model objects, invoking actions and rendering the response. This way you end up with basically a JSP or Facelets (XHTML) page for View and a JavaBean class as Model. The JSF components are use...
Creating a BLOB from a Base64 string in JavaScript
...gth; i++) {
byteNumbers[i] = byteCharacters.charCodeAt(i);
}
You can convert this array of byte values into a real typed byte array by passing it to the Uint8Array constructor.
const byteArray = new Uint8Array(byteNumbers);
This in turn can be converted to a BLOB by wrapping it in an array ...
@RequestBody and @ResponseBody annotations in Spring
... classpath (and have an <mvc:annotation-driven> setup), Spring would convert the incoming JSON to a UserStats object from the post body (because you added the @RequestBody annotation) and it would serialize the returned object to JSON (because you added the @ResponseBody annotation). So the Br...
How to implement the factory method pattern in C++ correctly
...s for all class members without some preliminary calculation, then I might convert that constructor to a static method. The static method performs the preliminary calculations, then returns a value result via a private constructor which just does a member-wise initialisation.
I say 'might' because ...
How to do a case sensitive search in WHERE clause (I'm using SQL Server)?
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You can make the query using convert to varbinary – it’s very easy.
Example:
Select * from your_table where convert(varbinary, your_column) = convert(varbinary, 'aBcD')
sh...
mongodb/mongoose findMany - find all documents with IDs listed in array
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@chovy try converting them to ObjectIds first, instead of passing strings.
– Georgi Hristozov
Dec 2 '14 at 15:28
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Django Template Variables and Javascript
...def js(obj):
return mark_safe(json.dumps(obj))
This template filters converts variable to JSON string. You can use it like so:
// myapp/templates/example.html
{% load js %}
<script type="text/javascript">
var someVar = {{ some_var | js }};
</script>
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How to make the tab character 4 spaces instead of 8 spaces in nano?
... with a language like python (as in your example) it's also a good idea to convert tabs to spaces.
Edit your ~/.nanorc file (or create it) and add:
set tabsize 4
set tabstospaces
If you already got a file with tabs and want to convert them to spaces i recommend the expandcommand (shell):
expand...
How to change an Eclipse default project into a Java project
...it checked out as a "default" project. What is the easiest way to quickly convert this into a "Java" project?
11 Answers
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