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String literals and escape characters in postgresql
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Postgres does truncate data on input in some very specific situations. For example, a character varying(4) column given the input "test " (two spaces following the word, 6 characters) will truncate the spaces and store the value "tes...
What is the difference between MacVim and regular Vim?
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unfortunately, with "mvim -v", ALT plus arrow windows still does not work. I have not found any way to enable it :-(
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Which $_SERVER variables are safe?
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@deceze @Rook Does SERVER_PORT need that little cross? bugs.php.net/bug.php?id=64457
– Dejan Marjanović
Apr 13 '14 at 15:46
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How can I save an image with PIL?
...equency domain to be saved as an integer image, PIL is telling you that it doesn't accept float data to save as BMP.
Here is a suggestion (with other minor modifications, like using fftshift and numpy.array instead of numpy.asarray) for doing the conversion for proper visualization:
import sys
impor...
Saving utf-8 texts in json.dumps as UTF8, not as \u escape sequence
...astian: right, because str.encode('utf8') decodes implicitly first. But so does unicode(data), if given a str object. :-) Using io.open() gives you more options though, including using a codec that writes a BOM and you are following the JSON data with something else.
– Martijn ...
Importing from a relative path in Python
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Doing a relative import is absolulutely OK! Here's what little 'ol me does:
#first change the cwd to the script path
scriptPath = os.path.realpath(os.path.dirname(sys.argv[0]))
os.chdir(scriptPath)
#append the relative location you want to import from
sys.path.append("../common")
#import you...
What are “sugar”, “desugar” terms in context of Java 8?
I hear about 'sugaring' and 'desugaring' more often in Java 8, what does these terms mean ? are they conceptual or syntactical.
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Center/Set Zoom of Map to cover all visible Markers?
...y: none, the fitBounds function reads the map's size as 0x0, and therefore does not do anything. To change the viewport while the map is hidden, set the map to visibility: hidden, thereby ensuring the map div has an actual size.
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Difference between std::result_of and decltype
...le (with a suitable library).
decltype is an entirely new thing in C++0x, does not restrict only to return type of a function, and is a language feature.
Anyway, on gcc 4.5, result_of is implemented in terms of decltype:
template<typename _Signature>
class result_of;
template<...
Selecting data frame rows based on partial string match in a column
... but if it is, you can definitely use it as follows.
Note that the object does not have to be a data.table (but also remember that subsetting approaches for data.frames and data.tables are not identical):
library(data.table)
mtcars[rownames(mtcars) %like% "Merc", ]
iris[iris$Species %like% "osa", ...