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How to output only captured groups with sed?
... what you don't want to be output as well as specifying what you do want.
string='This is a sample 123 text and some 987 numbers'
echo "$string" | sed -rn 's/[^[:digit:]]*([[:digit:]]+)[^[:digit:]]+([[:digit:]]+)[^[:digit:]]*/\1 \2/p'
This says:
don't default to printing each line (-n)
exclude ...
Getting individual colors from a color map in matplotlib
...You can do this with the code below, and the code in your question was actually very close to what you needed, all you have to do is call the cmap object you have.
import matplotlib
cmap = matplotlib.cm.get_cmap('Spectral')
rgba = cmap(0.5)
print(rgba) # (0.99807766255210428, 0.99923106502084169,...
How do I get the logfile from an Android device?
...eDateFormat df = new SimpleDateFormat("yyyy-MM-dd", Locale.ITALY);
String fullName = df.format(datum)+"appLog.log";
File file = new File (Environment.getExternalStorageDirectory(), fullName);
//clears a file
if(file.exists()){
file.delete();
}
...
Spring Boot JPA - configuring auto reconnect
...o have any effect, the validationQuery parameter must be set to a non-null string.
– Rick
Jun 23 '15 at 2:53
...
Concatenate a vector of strings/character
...f I have a vector of type character, how can I concatenate the values into string? Here's how I would do it with paste() :
...
What is the difference between & and && in Java?
... a short circuit operator whereas & is a AND operator.
Try this.
String s = null;
boolean b = false & s.isEmpty(); // NullPointerException
boolean sb = false && s.isEmpty(); // sb is false
shar...
How to get the part of a file after the first line that matches a regular expression?
... this solution worked for me because i can easily use variables as my string to check for.
– Jose Martinez
Mar 9 '16 at 17:15
3
...
HashMap to return default value for non-found keys?
...roblem with this approach is if the value is a complicated object. Map<String, List>#put won't work as expected.
– Eyal
Nov 5 '14 at 14:53
...
CMap用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的效率。CMap就是对Hash表的一种实现。先上实例：
int _tmain(int argc, char* argv[])
{
//定义
typedef CMap<int, int, CString, CString> CMapInt;
CMapInt map;
//添加key，val
map.SetAt(1, "str1");
map.SetAt(2, "str2");
map.SetAt(3, "str3");
map.SetAt(1, "s...
c++读注册表 - C/C++ - 清泛网 - 专注C/C++及内核技术
c++读注册表直接上代码：CString key;key.Format(_T("Software Microsoft Windows CurrentVersion App Paths xxx"));HKEY hKey;LONG rc = R...直接上代码：
CString key;
key.Format(_T("Software\\Microsoft\\Windows\\CurrentVersion\\App Paths\\xxx"));
HKEY hKey;
LONG rc = Reg...