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Regular expression for floating point numbers
...a floating point number is
[+-]?([0-9]*[.])?[0-9]+
This will match:
123
123.456
.456
See a working example
If you also want to match 123. (a period with no decimal part), then you'll need a slightly longer expression:
[+-]?([0-9]+([.][0-9]*)?|[.][0-9]+)
See pkeller's answer for a fuller e...
How to center icon and text in a android button with width set to “fill parent”
..."wrap_content"
android:layout_height="wrap_content"
android:minHeight="32dp"
android:minWidth="150dp"
android:gravity="center_horizontal|top" />
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What are the key differences between Scala and Groovy? [closed]
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230
They're both object oriented languages for the JVM that have lambdas and closures and interoper...
Differences between Proxy and Decorator Pattern
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edited Mar 2 at 23:21
answered Mar 1 at 19:21
jaco...
How to change app name per Gradle build type
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173
If by "app name", you mean android:label on <application>, the simplest solution is to hav...
C++常用排序算法汇总 - C/C++ - 清泛网 - 专注C/C++及内核技术
...f("%d ",arr[i]);
printf("\n");
free(arr);
arr = 0;
return 0;
}
3、快速排序(QuickSort)
/************************************
* 快速排序
* 不稳定排序，O{nlogn} ~ O{n^2}
* 适合排序大量数据
* 设最左边为基准数
* 右边往左找一个比基准数小...
Objective-C: Reading a file line by line
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63
That's a great question. I think @Diederik has a good answer, although it's unfortunate that Coc...
How to sort an array of associative arrays by value of a given key in PHP?
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632
You are right, the function you're looking for is array_multisort().
Here's an example taken st...
explicit casting from super class to subclass
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330
By using a cast you're essentially telling the compiler "trust me. I'm a professional, I know ...
How to deploy correctly when using Composer's develop / production switch?
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335
Why
There is IMHO a good reason why Composer will use the --dev flag by default (on install a...