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What's the best way to check if a String represents an integer in Java?

...they aren't bad performers. public void RunTests() { String str = "1234567890"; long startTime = System.currentTimeMillis(); for(int i = 0; i < 100000; i++) IsInt_ByException(str); long endTime = System.currentTimeMillis(); System.out.print("ByException: "); ...
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How to get evaluated attributes inside a custom directive

...32; }​ . <div ng-controller="MyCtrl"> <input my-directive="123"> <input my-directive="1+1"> <input my-directive="'1+1'"> <input my-directive="aaa"> </div>​​​​​​​​ One thing you should notice here is that, if you want set the val...
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Using str_replace so that it only acts on the first match?

...n preg_replace($from, $to, $content, 1); } echo str_replace_first('abc', '123', 'abcdef abcdef abcdef'); // outputs '123def abcdef abcdef' The magic is in the optional fourth parameter [Limit]. From the documentation: [Limit] - The maximum possible replacements for each pattern in each s...
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How should I write tests for Forms in Django?

... response = self.client.post("/form-url/", data={ 'name': 'test123', 'category': 1, 'note': 'note123' }, content_type=django.test.client.MULTIPART_CONTENT) If any stuck with getting empty instance when saving the form, then check the requests sent from br...
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How can I update NodeJS and NPM to the next versions?

... 123 npm update npm -g didn't work for me on windows - it completed without output but npm remained the same version (1.3.11 when the most rece...
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使用Activity启动器组件 · App Inventor 2 中文网

...,例如, Action:android.intent.action.VIEW DataUri:https://www.fun123.cn 使用预先指定的消息启动邮件程序 2020 年 1 月 26 日:此示例已更新以适应 android 中的更改。 此处显示的电子邮件发送代码将在下一个应用程序发明者版本中运行,...
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What is a non-capturing group in regular expressions?

... [] is a set; [123] matches any char inside the set once; [^123] matches anything NOT inside the set once; [^/\r\n]+ matches one or more chars that are different from /, \r, \n. – Ricardo Nolde Jun 5 ...
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Oracle SELECT TOP 10 records

...ply in a query like this one - Select * from SomeTable where someColumn = '123' and rownum <=3. Is it after selecting the results from [Select * from SomeTable where someColumn = '123' ] – Shirgill Farhan Dec 3 '19 at 9:18 ...
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Why can't an anonymous method be assigned to var?

...you like to be inferred for the following cases? var x1 = (ref int y)=>123; There is no Func<T> type that takes a ref anything. var x2 = y=>123; We don't know the type of the formal parameter, though we do know the return. (Or do we? Is the return int? long? short? byte?) var x3 =...
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Are default enum values in C the same for all compilers?

...tion: Value of jan will be 0,feb will be 1,mar will be 2. enum months{jan=123,feb=999,mar} Explanation: Value of jan will be 123,feb will be 999,mar will be 1000. enum months{jan='a',feb='s',mar} Explanation: Value of jan will be 'a',feb will be 's',mar will be 't'. ...