大约有 19,000 项符合查询结果（耗时：0.0332秒） [XML]
What is the equivalent of “none” in django templates?
...
Any idea how to use this with other filters such as date? For example, is it possible to display "N/A" if a date is none but otherwise format it? Like: {{ post.pub_date|default_if_none:"N/A"|date:"Y-m-d" }}?
...
How do I make an HTML text box show a hint when empty?
...hould display the text normally (black, non-italics). This will help me avoid clutter by removing the label.
21 Answers
...
powershell 2.0 try catch how to access the exception
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled...
How can I force Powershell to return an array when a call only returns one object?
... / robust way to do it, but it's enough for Azure.
Update
Well the above did work. I've tried all the above and some, but the only way I have managed to pass $vmObject as an array, compatible with the deployment template, with one element is as follows (I expect MS have been playing again (this was...
SQL join on multiple columns in same tables
...
Join like this:
ON a.userid = b.sourceid AND a.listid = b.destinationid;
share
|
improve this answer
|
follow
...
What's the difference between '$(this)' and 'this'?
...going to be in the first element.
$("#myDiv")[0] === document.getElementById("myDiv");
And so on...
share
|
improve this answer
|
follow
|
...
How can I click a button behind a transparent UIView?
... the subview takes up the center of the screen with 100 px margins on all sides. We then add a bunch of little stuff to click on inside that subview. We are only using the subview to take advantage of the new frame ( x=0, y=0 inside the subview is actually 100,100 in the parent view).
...
psql: FATAL: role “postgres” does not exist
...tgres.
You can make your local install look a bit more traditional and avoid these problems by doing a one time:
/Applications/Postgres.app/Contents/Versions/9.*/bin/createuser -s postgres
which will make those FATAL: role "postgres" does not exist go away.
...
Objective-C: Calling selectors with multiple arguments
...
Your method signature is:
- (void) myTest:(NSString *)
withAString happens to be the parameter (the name is misleading, it looks like it is part of the selector's signature).
If you call the function in this manner:
[self performSelector:@selector(myTe...
How to escape hash character in URL
...
@zw963 did you find a solution
– Dave
Aug 29 '17 at 14:24
...