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Version vs build in Xcode
...ame values.
When viewing the Info tab, if you right-click and select Show Raw Keys/Values, you'll see the actual names are CFBundleShortVersionString (Version) and CFBundleVersion (Build).
The Version is usually used how you appear to have been using it with Xcode 3. I'm not sure on what level you...
Quickly reading very large tables as dataframes
... currently claims to be "1.5-2x slower" than data.table::fread).
read.csv.raw from iotools provides a third option for quickly reading CSV files.
Trying to store as much data as you can in databases rather than flat files. (As well as being a better permanent storage medium, data is passed to and...
Is there a way to instantiate objects from a string holding their class name?
...igning to it. Have a look at its documentation here. Finally, the use of a raw function pointer is also a bit oldish. Modern C++ code should be decoupled from specific functions / types. You may want to look into Boost.Function to look for a better way. It would look like this then (the map):
typed...
How can I build a small operating system on an old desktop computer? [closed]
...le system yet ... not even partition table parsing; so we'd just deal with raw ranges of blocks on the disk at first).
At that point your boot loader should be able to pull new code across the serial line, dump it into a partition (yes, implement partition table handling of some sort ... whether it...
How to remove convexity defects in a Sudoku square?
...gt; max_area:
max_area = area
best_cnt = cnt
cv2.drawContours(mask,[best_cnt],0,255,-1)
cv2.drawContours(mask,[best_cnt],0,0,2)
res = cv2.bitwise_and(res,mask)
Result :
3. Finding Vertical lines
kernelx = cv2.getStructuringElement(cv2.MORPH_RECT,(2,10))
dx = cv2.Sobe...
Why would one omit the close tag?
...; however solves just a trickle of the common headers already sent causes (raw output, BOM, notices, etc.) and their follow-up problems.
PHP actually contains some magic to eat up single linebreaks after the ?> closing token. Albeit that has historic issues, and leaves newcomers still susceptibl...
Why hasn't functional programming taken over yet?
...ch for the sorts of problems we face. Our problems are all about taking in raw information -- strings and metadata -- and transforming them into different strings and metadata. In situations where mutations occur, like someone is typing in the IDE, the problem space inherently lends itself to functi...
How do I find Waldo with Mathematica?
...pick out the pixels in the image with a sufficiently high correlation and draw white circle around them to emphasize them using Dilation
pos = Dilation[ColorNegate[Binarize[corr, .12]], DiskMatrix[30]];
I had to play around a little with the level. If the level is too high, too many false positiv...
Read an Excel file directly from a R script
... on MacOS and Linux, but takes an extra step on Windows, i.e. see http://strawberryperl.com/). There are various caveats, and alternatives, listed on the R wiki page.
The only reason I see not to do this directly is that you may want to examine the spreadsheet to see if it has glitches (weird heade...
How can I parse a CSV string with JavaScript, which contains comma in data?
...tive regular expressions syntax (expressed using Python's handy r'''...''' raw-multi-line-string syntax).
First here is a regular expression which validates that a CVS string meets the above requirements:
Regular expression to validate a "CSV string":
re_valid = r"""
# Validate a CSV string having s...