大约有 45,000 项符合查询结果（耗时：0.0398秒） [XML]
difference between foldLeft and reduceLeft in Scala
...
For reference, reduceLeft will error if applied to an empty container with the following error.
java.lang.UnsupportedOperationException: empty.reduceLeft
Reworking the code to use
myList foldLeft(List[String]()) {(a,b) => a+b}
is one potential op...
What text editor is available in Heroku bash shell? [closed]
... the git repo .... over HTTPS without a commit hash - possible certificate error?'
– Tim Malone
Jun 27 '17 at 6:28
3
...
What 'additional configuration' is necessary to reference a .NET 2.0 mixed mode assembly in a .NET 4
...t work. It comes up when using log4net. I can't find anything about this error re: log4net except for here: stackoverflow.com/questions/1866735/log4net-and-net-4-0, but it doesn't say much. Any ideas on how I can get more information about my particular issue?
– Dave
...
I am getting Failed to load resource: net::ERR_BLOCKED_BY_CLIENT with Google chrome
...ly Do I need any settings in the browser?
and the link will come after the error
12 Answers
...
It is more efficient to use if-return-return or if-else-return?
...ements do make sense: text/data protocol parsers, functions with extensive error handling etc)
The consensus from all those industry coding standards is that the expression should be written as:
int result;
if(A > B)
{
result = A+1;
}
else
{
result = A-1;
}
return result;
Regarding eff...
How slow are .NET exceptions?
...re'd be more stack to go through, so you'd blow the cache etc" - but using error codes to work your way up the stack would also blow the cache, so I don't see that as a particularly good argument.
Just to make it clear - I don't support using exceptions where they're not logical. For instance, int....
Raise warning in Python without interrupting program
...ning, you should be using warnings module. By raising it you're generating error, rather than warning.
share
|
improve this answer
|
follow
|
...
I want to exception handle 'list index out of range.'
...g the exception is the way to go:
try:
gotdata = dlist[1]
except IndexError:
gotdata = 'null'
Of course you could also check the len() of dlist; but handling the exception is more intuitive.
share
|
...
Entity Framework: There is already an open DataReader associated with this Command
I am using Entity Framework and occasionally i will get this error.
17 Answers
17
...
Check if a temporary table exists and delete if it exists before creating a temporary table
...ng as I don't change the columns. If I add a column later, it will give an error saying "invalid column". Please let me know what I am doing wrong.
...