大约有 19,000 项符合查询结果（耗时：0.0227秒） [XML]
handlerbars.js check if list is empty
...
The "each" tag can take an "else" section too. So the simplest form is:
{{#each items}}
// render item
{{else}}
// render empty
{{/each}}
share
|
improve this answer
|
...
Is there an equivalent of 'which' on the Windows command line?
...ted to PATH since you can substitute any environment variable (in the path format, of course) that you wish to use.
And, if you want one that can handle all the extensions in PATHEXT (as Windows itself does), this one does the trick:
@echo off
setlocal enableextensions enabledelayedexpansion
::...
REST API error return good practices [closed]
... for the refusal in the entity. If the server does not wish to make this information available to the client, the status code 404 (Not Found) can be used instead.
This tells the client that the request was OK, but that it failed (something a 200 doesn't do). This also gives you the opportunity to ...
Any reason not to use '+' to concatenate two strings?
... you might want to think something else.
''.join([a, b, c]) trick is a performance optimization.
share
|
improve this answer
|
follow
|
...
What does in XML mean?
...e of comments.
This means given these four snippets of XML from one well-formed document:
<!ENTITY MyParamEntity "Has been expanded">
<!--
Within this comment I can use ]]>
and other reserved characters like <
&, ', and ", but %MyParamEntity; will not be expanded
(if I retr...
How to tell if a string is not defined in a Bash shell script
...for the section "Parameter Expansion" and then for this text: "When not performing substring expansion, using the forms documented below, bash tests for a parameter that is unset or null ['null' meaning the empty string]. Omitting the colon results in a test only for a parameter that is unset (...) ...
Multiple working directories with Git?
.../other-linked-worktree 1234abc (detached HEAD)
There is also porcelain format option available.
The porcelain format has a line per attribute.
Attributes are listed with a label and value separated by a single space.
Boolean attributes (like 'bare' and 'detached') are listed as a label o...
How is null + true a string?
...es from the C# language spec.
From section 7.3.4:
An operation of the form x op y, where op is an overloadable binary operator, x is an expression of type X, and y is an expression of type Y, is processed as follows:
The set of candidate user-defined operators provided by X and Y for th...
iPad Web App: Detect Virtual Keyboard Using JavaScript in Safari?
...lanation (if you research and write one, I'd love to read it). The two platforms handle onscreen keyboards in their main browsers very differently. Android Chrome shrinks the viewport height to make room for the keyboard, so the page resizes when the keyboard is shown. iOS Safari overlays the page w...
Java equivalent of C#'s verbatim strings with @
...age that does, however, you might want to look at Groovy which has various forms of string literal.
share
|
improve this answer
|
follow
|
...