大约有 5,886 项符合查询结果（耗时：0.0232秒） [XML]
SparseArray vs HashMap
...8,072 bytes
HashMap:
class HashMap<K, V> {
Entry<K, V>[] table;
Entry<K, V> forNull;
int size;
int modCount;
int threshold;
Set<K> keys
Set<Entry<K, V>> entries;
Collection<V> values;
}
Class = 12 + 8 * 4 = 48 bytes
Entry ...
List of standard lengths for database fields
I'm designing a database table and once again asking myself the same stupid question: How long should the firstname field be?
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Has anyone actually implemented a Fibonacci-Heap efficiently?
... (In the line typedef relaxed_heap<Vertex, IndirectCmp, IndexMap> MutableQueue, change relaxed to fibonacci.) I first forgot to compile with optimizations, in which case Fibonacci and binary heaps perform about the same, with Fibonacci heaps usually outperforming by an insignificant amount. ...
What's the correct way to communicate between controllers in AngularJS?
...e is a jsperf that shows how much of a perf impact $broadcastbrings to the table in a decent scenario with just 100 $scope's.
http://jsperf.com/rootscope-emit-vs-rootscope-broadcast
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impro...
Expansion of variables inside single quotes in a command in Bash
...positional arguments. The following invocation is better -- it's not exploitable:
script='echo "arg 1 is: $1"'
/bin/sh -c "$script" -- "$myvar"
Note the use of single ticks in the assignment to script, which means that it's taken literally, without variable expansion or any other form of interpre...
What is the difference between and ?
...> element as an element of last resort, for when no other element is suitable. Use of more appropriate elements instead of the <div> element leads to better accessibility for readers and easier maintainability for authors.
(https://www.w3.org/TR/html/grouping-content.html#the-div-element)
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How do I check if an integer is even or odd? [closed]
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You should optimise this with a look-up table.
– Weeble
Feb 27 '10 at 2:45
1
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Is a Java string really immutable?
We all know that String is immutable in Java, but check the following code:
15 Answers
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How to get image height and width using java?
... byte: H is first four bits and V is second four bits
o Quantization table number-- one byte
The H and V sampling factors dictate the final size of the component they are associated with. For instance, the color space defaults to YCbCr and the H and V sampling factors for each component, Y, C...
grant remote access of MySQL database from any IP address
...SERNAME'@'1.2.3.4';
Its better to check information_schema.user_privileges table after running REVOKE command.
If you see USAGE privilege after running REVOKE command, its fine. It is as good as no privilege at all. I am not sure if it can be revoked.
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