大约有 43,000 项符合查询结果（耗时：0.0548秒） [XML]
Catching an exception while using a Python 'with' statement
...re__ import with_statement
try:
with open( "a.txt" ) as f :
print f.readlines()
except EnvironmentError: # parent of IOError, OSError *and* WindowsError where available
print 'oops'
If you want different handling for errors from the open call vs the working code you could do:
try...
How to extract a substring using regex
I have a string that has two single quotes in it, the ' character. In between the single quotes is the data I want.
13 An...
“continue” in cursor.forEach()
I'm building an app using meteor.js and MongoDB and I have a question about cursor.forEach().
I want to check some conditions in the beginning of each forEach iteration and then skip the element if I don't have to do the operation on it so I can save some time.
...
how to schedule a job for sql query to run daily?
I need to know how to make a SQL query run daily using a SQL Server Agent job, with minimum required configuration settings.
...
ios app maximum memory budget
I'm working on an ios game that's targeting as a minimum the 3gs. We are using HD assets for retina display devices (iphone 4, ipod touch 4th gen).
...
How to keep up with the latest versions of Node.js in Ubuntu? PPA? Compiling?
Where can (can I ?) find .deb packages for the latest versions of Node.js ?
6 Answers
...
How to generate and validate a software license key?
I'm currently involved in developing a product (developed in C#) that'll be available for downloading and installing for free but in a very limited version. To get access to all the features the user has to pay a license fee and receive a key. That key will then be entered into the application to "u...
is node.js' console.log asynchronous?
Are console.log/debug/warn/error in node.js asynchrounous? I mean will javascript code execution halt till the stuff is printed on screen or will it print at a later stage?
...
Comments in .gitignore?
Can you write comments in a .gitignore file?
2 Answers
2
...
Invalid argument supplied for foreach()
...
Personally I find this to be the most clean - not sure if it's the most efficient, mind!
if (is_array($values) || is_object($values))
{
foreach ($values as $value)
{
...
}
}
The reason for my preference is it doesn't...