大约有 30,000 项符合查询结果（耗时：0.0356秒） [XML]
Is there an “exists” function for jQuery?
...
In JavaScript, everything is 'truthy' or 'falsy', and for numbers 0 means false, everything else true. So you could write:
if ($(selector).length)
You don't need that >0 part.
share
|
imp...
String comparison in Python: is vs. == [duplicate]
... statement
if x is y then x==y is also True
should never be read to mean
if x==y then x is y
It is a logical error on the part of the reader to assume that the converse of a logic statement is true. See http://en.wikipedia.org/wiki/Converse_(logic)
...
EJB's - when to use Remote and/or local interfaces?
...the big advantages of Java EE is that it is easy to scale (which I believe means you can deploy different components on different servers). Is that where Remote and Local interfaces come in? Are you supposed to use Remote interfaces if you expect your application to have different components on diff...
Sending message through WhatsApp
...s still sent, but a Dialog opens saying that there's no matching app. This means you are not providing any way to check whether WhatsApp is installed or not.
– 0101100101
Jul 25 '14 at 14:28
...
What is the best way to paginate results in SQL Server
...med column or an alternate element name. Doing neither is not in the doc, meaning the behavior is unreliable. Third, the more we accept the broken FOR XML PATH ('') syntax, the less likely it is that MS actually provides a real LISTAGG() [ OVER() ] function like they have needed to.
...
How do I write data into CSV format as string (not file)?
I want to cast data like [1,2,'a','He said "what do you mean?"'] to a CSV-formatted string.
6 Answers
...
Green Bars in Visual Studio 2010
...are they for? They look pretty random but of course they have to have some meaning. Can any one tell me?
6 Answers
...
Reading ePub format
...ote that there's no particular need "to unzip it somewhere" if by that you mean creating separate new files that are the unpacked contents of the ZIP archive. ZIP is a pretty simple format, and it should be fairly easy to create libraries that give you input streams for the various files in the arch...
How do I reword the very first git commit message?
...is this to be considered "legitimate" practice, for lack of better word. I mean, is it common/recommended to do it like this? Also, can you do this time and time again in cases with faulty commit messages? Reason for asking that is because I first did it with the wrong commit SHA-1, copying your sni...
What Android tools and methods work best to find memory/resource leaks? [closed]
... Okay, so I have a user constantly switching between activities, meaning they may have switched 15 activities in 20 seconds. Could that be a cause of an out of memory error? What should I do to fix it? Thanks!'
– Ruchir Baronia
Jan 5 '16 at 5:44
...