大约有 15,630 项符合查询结果（耗时：0.0322秒） [XML]
Check a collection size with JSTL
... or newer (Servlet 3.0 / JSP 2.2 or newer). If you're facing a XML parsing error because you're using JSPX or Facelets instead of JSP, then use gt instead of >.
<c:if test="${companies.size() gt 0}">
</c:if>
If you're actually facing an EL parsing error, then you're probably using a...
How to add facebook share button on my website?
... how do we know, if the user has actually shared our content? PS: response.error_message will appear only if someone using your app has authenciated your app
– Pearl
Sep 18 '18 at 6:13
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Can we have multiple “WITH AS” in single sql - Oracle SQL
...e WHERE A=B down in the body of the select "below" the WITH clauses.
The error I'm getting following these WITH declarations is the identifiers (field names) in B are not recognized, down in the body of the rest of the SQL. So the WITH syntax seems to run OK, but cannot access the results from t2...
Running unittest with typical test directory structure
...
This fails for me on Python 3 with the error ImportError: No module named 'test.test_antigravity' because of a conflict with the test sub-module of the unittest library. Maybe an expert can confirm and change the answer sub-directory name to e.g., 'tests' (plural)...
erb, haml or slim: which one do you suggest? And why? [closed]
...script for JS tags
Cons
whitespace dependent which makes for some hard errors to figure out at times
complex tags usually need to resort to "hash" format. (Although I actually think this is a great example of flexibility to someone starting out it could be a pain.)
added as a gem (again probably...
Create a devise user from Ruby console
...irmation => 'password')
u.save
if this returns false, you can call
u.errors
to see what's gone wrong.
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IIS_IUSRS and IUSR permissions in IIS8
...ks. Adding IIS AppPool\Cache (the name of my application pool) yields HTTP Error 401.3 - Unauthorized
– Charles Burns
Jul 22 '16 at 21:10
14
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Is null an Object?
...ype null
According to OpenJDKs 12.0.1 javac it is:
true.toString(); // error: boolean cannot be dereferenced
null.toString(); // error: <null> cannot be dereferenced
Where the angle brackets imply that null is of an other than a primitive type. And according to JLS 4.1:
There are tw...
What are the use(s) for tags in Go?
...indJSON(&json); err != nil {
c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
return
}
the binding tag in this example gives hint to gin package that the data sent to API must have user and password fields cause these fields are tagged as required.
So generraly tags are da...
Using the HTML5 “required” attribute for a group of checkboxes?
...'s a bit I pulled together for JQuery users, including a custom validation error message:
$cbx_group = $("input:checkbox[name^='group']");
$cbx_group.on("click", function() {
if ($cbx_group.is(":checked")) {
// checkboxes become unrequired as long as one is checked
$cbx_group.pr...