大约有 7,000 项符合查询结果（耗时：0.0208秒） [XML]
TypeScript sorting an array
...issue I ran into with typescript. It was treating an inline Boolean expression as whatever the first value's type was instead of the complete expression.
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How to convert Set to String[]?
... end up to be less efficient.
See also the source code of AbstractCollection#toArray().
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MySQL check if a table exists without throwing an exception
...able exists in MySQL (preferably via PDO in PHP) without throwing an exception. I do not feel like parsing the results of "SHOW TABLES LIKE" et cetera. There must be some sort of boolean query?
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What is the C# Using block and why should I use it? [duplicate]
...pe.
Given:
public class SomeDisposableType : IDisposable
{
...implmentation details...
}
These are equivalent:
SomeDisposableType t = new SomeDisposableType();
try {
OperateOnType(t);
}
finally {
if (t != null) {
((IDisposable)t).Dispose();
}
}
using (SomeDisposableType u ...
Long press on UITableView
...er *lpgr = [[UILongPressGestureRecognizer alloc]
initWithTarget:self action:@selector(handleLongPress:)];
lpgr.minimumPressDuration = 2.0; //seconds
lpgr.delegate = self;
[self.myTableView addGestureRecognizer:lpgr];
[lpgr release];
Then in the gesture handler:
-(void)handleLongPress:(UILongPr...
How can I set focus on an element in an HTML form using JavaScript?
...t type="text" id="mytext"/>
Your script would be
<script>
function setFocusToTextBox(){
document.getElementById("mytext").focus();
}
</script>
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Fatal error: unexpectedly found nil while unwrapping an Optional values [duplicate]
I was using an UICollectionView in Swift but I get when I try to change the text of the cell's label.
13 Answers
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How can I pad a String in Java?
...rightPad, center and repeat.
But please note that — as others have mentioned and demonstrated in this answer — String.format() and the Formatter classes in the JDK are better options. Use them over the commons code.
sh...
Map implementation with duplicate keys
...
You are searching for a multimap, and indeed both commons-collections and Guava have several implementations for that. Multimaps allow for multiple keys by maintaining a collection of values per key, i.e. you can put a single object into the map, but you retrieve a collection.
If you can ...
How do I convert seconds to hours, minutes and seconds?
I have a function that returns information in seconds, but I need to store that information in hours:minutes:seconds.
12 An...