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Hidden features of Windows batch files
..., I'm thankful for it.
FOR /F "eol=; tokens=2,3* delims=, " %i in (myfile.txt) do @echo %i %j %k
would parse each line in myfile.txt, ignoring lines that begin with a semicolon, passing the 2nd and 3rd token from each line to the for body, with tokens delimited by commas and/or spaces.
Notice the...
How to create a shared library with cmake?
...es:
Libs: -L${libdir} -lmylib
Cflags: -I${includedir}
In your CMakeLists.txt, add a rule to expand @ macros (@ONLY ask to cmake to not expand variables of the form ${VAR}):
configure_file(mylib.pc.in mylib.pc @ONLY)
And finally, install generated file:
install(FILES ${CMAKE_BINARY_DIR}/mylib.p...
Parse v. TryParse
...r and if it fail then assign number to zero.
if (!Int32.TryParse(txt,out tmpint)) {
tmpint = 0;
}
and:
try {
tmpint = Convert.ToInt32(txt);
} catch (Exception) {
tmpint = 0;
}
For c#, the best option is to use trypars...
How can I output leading zeros in Ruby?
...o you could do something like:
irb(main):002:0> filename = "%s/%s.%04d.txt" % ["dirname", "filename", 23]
=> "dirname/filename.0023.txt"
Here's a printf format cheat sheet you might find useful in forming your format string. The printf format is originally from the C function printf, but s...
What causes “Unable to access jarfile” error?
... admin cmd
java -jar c:\fw\ducky\duckencode.jar -I c:\fw\ducky\HelloWorld.txt -o c:\fw\ducky\inject.bin
But got this error:
Error: unable to access jarfile c:\fw\ducky\duckencode.jar
Solution
1st step
Right click the jarfile in question. Click properties.
Click the unblock tab in bottom ri...
Is there a way to 'pretty' print MongoDB shell output to a file?
...ah.mongolab.com:33478/blah -u user -p pass --eval "my query" >> dump.txt but it gave me JavaScript execution failed: SyntaxError: Unexpected token ILLEGAL.
– Sheharyar
Dec 5 '13 at 6:39
...
How do I check if a property exists on a dynamic anonymous type in c#?
...tProperty(name) != null;
}
var settings = new {Filename = @"c:\temp\q.txt"};
Console.WriteLine(IsPropertyExist(settings, "Filename"));
Console.WriteLine(IsPropertyExist(settings, "Size"));
Output:
True
False
s...
Swift 编程语言入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...Objective-C代码，这个语法看起来很熟悉，在Swift，这就是完整的程序了。你无需导入(import)一个单独的库供输入输出和字符串处理。全局范围的代码就是用于程序的入口，所以你无需编写一个 main() 函数。你也无需在每个语句后写...
Deleting a file in VBA
...ile, it does not exist!"
On Error Resume Next
aFile = "c:\file_to_delete.txt"
Kill aFile
On Error Goto 0
return Len(Dir$(aFile)) > 0 ' Make sure it actually got deleted.
If the file doesn't exist in the first place, mission accomplished!
...
Peak detection in a 2D array
...eason I had to reshape. Numpy ignored the shape header.
paws_data = np.loadtxt("paws.txt").reshape(4,11,14)
#getting a list of images
paws = [p.squeeze() for p in np.vsplit(paws_data,4)]
def detect_peaks(image):
"""
Takes an image and detect the peaks usingthe local maximum filter.
Re...