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Java String remove all non numeric characters
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Try this code:
String str = "a12.334tyz.78x";
str = str.replaceAll("[^\\d.]", "");
Now str will contain "12.334.78".
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How can I run PowerShell with the .NET 4 runtime?
... the framework that PowerShell runs with), but now needs to work with .NET 4 assemblies as well as .NET 2 assemblies.
11 An...
How do I use the conditional operator (? :) in Ruby?
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498
It is the ternary operator, and it works like in C (the parenthesis are not required). It's an...
Generics in C#, using type of a variable as parameter [duplicate]
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4 Answers
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How can I count the occurrences of a list item?
... only want one item's count, use the count method:
>>> [1, 2, 3, 4, 1, 4, 1].count(1)
3
Don't use this if you want to count multiple items. Calling count in a loop requires a separate pass over the list for every count call, which can be catastrophic for performance. If you want to count...
How do I extract text that lies between parentheses (round brackets)?
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457
If you wish to stay away from regular expressions, the simplest way I can think of is:
string...
Maximum Java heap size of a 32-bit JVM on a 64-bit OS
...2-bit OS, given that 32-bit OSes have a maximum addressable memory size of 4GB, and that the JVM's max heap size depends on how much contiguous free memory can be reserved.
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How do I find out which keystore was used to sign an app?
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413
First, unzip the APK and extract the file /META-INF/ANDROID_.RSA (this file may also be CERT.R...
iOS开发调试技巧总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...成了。如果碰到异常crash时，尝试使用异常断点吧。
【4.符号断点Symbolic Breakpoint】
符号断点的创建也同异常断点。一般符号断点可以在你指定的[类名 方法名]时中断执行。
配置符号断点如下：可以当执行到ViewController类的v...
Convert Unix timestamp to a date string
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184
With GNU's date you can do:
date -d "@$TIMESTAMP"
# date -d @0
Wed Dec 31 19:00:00 EST 1969...