大约有 16,000 项符合查询结果（耗时：0.0363秒） [XML]
How to check if a String is numeric in Java
How would you check if a String was a number before parsing it?
39 Answers
39
...
SQL Server: Maximum character length of object names
What is the maximum character length of object name (e.g. constraint, column) in SQL Server 2008?
3 Answers
...
Cycles in family tree software
...eveloper of some family tree software (written in C++ and Qt). I had no problems until one of my customers mailed me a bug report. The problem is that the customer has two children with their own daughter, and, as a result, he can't use my software because of errors.
...
Unloading classes in java?
...tom class loader so that a desktop application can dynamically start loading classes from an AppServer I need to talk to. We did this since the amount of jars that are required to do this are ridiculous (if we wanted to ship them). We also have version problems if we don't load the classes dynamical...
Best practices/performance: mixing StringBuilder.append with String.concat
I'm trying to understand what the best practice is and why for concatenating string literals and variables for different cases. For instance, if I have code like this
...
How to return a part of an array in Ruby?
...
Yes, Ruby has very similar array-slicing syntax to Python. Here is the ri documentation for the array index method:
--------------------------------------------------------------- Array#[]
array[index] -> obj...
Repeat string to certain length
... is an efficient way to repeat a string to a certain length? Eg: repeat('abc', 7) -> 'abcabca'
13 Answers
...
How do I (or can I) SELECT DISTINCT on multiple columns?
I need to retrieve all rows from a table where 2 columns combined are all different. So I want all the sales that do not have any other sales that happened on the same day for the same price. The sales that are unique based on day and price will get updated to an active status.
...
Convert integer into byte array (Java)
what's a fast way to convert an Integer into a Byte Array ?
11 Answers
11
...
Is there a way to rename an Xcode 4 scheme?
I've been looking all over Xcode for this, but I can't find any place that allows you to rename an existing scheme in Xcode 4. Is this even possible?
...