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From Arraylist to Array
..., keep it an ArrayList. Else convert away!
ArrayList<Integer> foo = new ArrayList<Integer>();
foo.add(1);
foo.add(1);
foo.add(2);
foo.add(3);
foo.add(5);
Integer[] bar = foo.toArray(new Integer[foo.size()]);
System.out.println("bar.length = " + bar.length);
outputs
bar.length = 5
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How to find files that match a wildcard string in Java?
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Consider DirectoryScanner from Apache Ant:
DirectoryScanner scanner = new DirectoryScanner();
scanner.setIncludes(new String[]{"**/*.java"});
scanner.setBasedir("C:/Temp");
scanner.setCaseSensitive(false);
scanner.scan();
String[] files = scanner.getIncludedFiles();
You'll need to reference a...
What's the regular expression that matches a square bracket?
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answered May 29 '09 at 20:51
Peter StuifzandPeter Stuifzand
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文本导出excel，或者导出excel方式，研究一下。 - 微思想区 - 清泛IT论坛，...
...2431列表转CSV，文件管理器存储COM，开源库Java：https://blog.51cto.com/AmbitionGarden/7062348Java生成Excel的几种方式
Apache POI：Apache POI是一个流行的用于处理Microsoft Office文档的Java库。它提供了一组API，可以用于创建、读取和修改Excel文件...
How to check if an option is selected?
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It looks like you didn't read my answer. this.selected can be used instead of $(this).is(":selected") I guess there is no need for a jsperf for this, right? I have nothing against using jQuery!, but use it when you need it, not when it give not...
MongoDB atomic “findOrCreate”: findOne, insert if nonexistent, but do not update
...findOrCreate like operations.
This is thanks to the $setOnInsert operator new to 2.4, which allows you to specify updates which should only happen when inserting documents.
This, combined with the upsert option, means you can use findAndModify to achieve an atomic findOrCreate-like operation.
db....
Remove folder and its contents from git/GitHub's history
...mp;& git gc --prune=now --aggressive
git push --mirror https://project/new-repository
If you want to delete files then use the delete-files option instead:
java -jar bfg.jar --delete-files *.pyc
share
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Effect of NOLOCK hint in SELECT statements
...actions will slow down as they're now sharing their processing time with a new transaction.
Be careful to only use WITH (NOLOCK) in SELECT statements on tables that have a clustered index.
WITH(NOLOCK) is often exploited as a magic way to speed up database read transactions.
The result set can ...
bundle install returns “Could not locate Gemfile”
I'm new to Rails and am currently working through a guide.
The guide states:
9 Answers
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How to send parameters from a notification-click to an activity?
...t when launching the activity, and then in the activity class implement onNewIntent(Intent intent) event handler, that way you can access the new intent that was called for the activity (which is not the same as just calling getIntent(), this will always return the first Intent that launched your a...