大约有 47,000 项符合查询结果（耗时：0.0655秒） [XML]
Check if image exists on server using JavaScript?
...request.
$.get(image_url)
.done(function() {
// Do something now you know the image exists.
}).fail(function() {
// Image doesn't exist - do something else.
})
share
|
...
What does it mean by select 1 from table?
...not to).
EDIT
There actually is one case which I forgot about until just now. In the case where you are trying to determine existence of a value in the database from an outside language, sometimes SELECT 1 FROM TABLE_NAME will be used. This does not offer significant benefit over selecting an indi...
How to avoid variable substitution in Oracle SQL Developer with 'trinidad & tobago'
... set define works but the DBA wont allow to use it sometimes i dont know why
– nikhil sugandh
Oct 12 '18 at 18:14
add a comment
|
...
How do I get the key at a specific index from a Dictionary in Swift?
...
@Max, this is old Swift syntax. Now you can use: dict.enumerated().forEach { (index, element) in ... }
– Matthew Korporaal
Jan 15 '19 at 10:28
...
Android WebView style background-color:transparent ignored on android 2.2
...nt I tried your method and if fixed the flicker problem on Jelly Bean, but now it displays a black background on Gingerbread. Any other suggestion?
– Tiago
Aug 28 '13 at 23:33
2
...
Is there a “do … until” in Python? [duplicate]
...ce/generator that does not satisfy the predicate function - that's how it knows to stop taking. But if you then want to iterate over the rest thinking "now I'll get everything where the predicate was False", you'll miss the first item of those.
– PaulMcG
Jul 18...
How to test a confirm dialog with Cucumber?
...
The selenium driver now supports this
From Capybara you would access it like this:
page.driver.browser.switch_to.alert.accept
or
page.driver.browser.switch_to.alert.dismiss
or
page.driver.browser.switch_to.alert.text
...
What are Java command line options to set to allow JVM to be remotely debugged?
I know there's some JAVA_OPTS to set to remotely debug a Java program.
8 Answers
8
...
How to create Windows EventLog source from command line?
...ryType Error
-Message "Immunity to iocaine powder not detected, dying now"
-EventId 1
share
|
improve this answer
|
follow
|
...
Initializing IEnumerable In C#
...
Old now, but I would avoid the second option. You might want this to interact with other IEnumerables that are not compatible with arrays.
– Joel Coehoorn
Oct 5 '18 at 14:23
...