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MongoDB: Find a document by non-existence of a field?
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pip issue installing almost any library
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137
I found it sufficient to specify the pypi host as trusted. Example:
pip install --trusted-ho...
add a string prefix to each value in a string column using Pandas
...gt;>> df = pd.DataFrame({'col':['a',0]})
>>> df
col
0 a
1 0
>>> df['col'] = 'str' + df['col'].astype(str)
>>> df
col
0 stra
1 str0
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.NET 4.0 has a new GAC, why?
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181
Yes since there are 2 distinct Global Assembly Cache (GAC), you will have to manage each of th...
Get Image size WITHOUT loading image into memory
... load the image into memory when calling .open. Looking at the docs of PIL 1.1.7, the docstring for .open says:
def open(fp, mode="r"):
"Open an image file, without loading the raster data"
There are a few file operations in the source like:
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prefix = fp.read(16)
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fp.seek(0)
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Get String in YYYYMMDD format from JS date object?
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Access restriction: The type 'Application' is not API (restriction on required library rt.jar)
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Is it possible to use jQuery to read meta tags
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313
Just use something like:
var author = $('meta[name=author]').attr("content");
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Select n random rows from SQL Server table
...() , and then selecting from that table where the random number column < 0.1. I'm looking for a simpler way to do it, in a single statement if possible.
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