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Fast way to get image dimensions (not filesize)
I'm looking for a fast way to get the height and width of an image in pixels. It should handle at least JPG, PNG and TIFF, but the more the better. I emphasize fast because my images are quite big (up to 250 MB) and it takes soooo long to get the size with ImageMagick's identify because it obv...
Why does this code segfault on 64-bit architecture but work fine on 32-bit?
I came across the following C puzzle:
3 Answers
3
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How to turn on (literally) ALL of GCC's warnings?
I would like to enable -- literally -- ALL of the warnings that GCC has. (You'd think it would be easy...)
7 Answers
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Filling a DataSet or DataTable from a LINQ query result set
How do you expose a LINQ query as an ASMX web service? Usually, from the business tier, I can return a typed DataSet or DataTable which can be serialized for transport over ASMX.
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Git pull after forced update
... commits
git fetch
Reset
You can reset the commit for a local branch using git reset.
To change the commit of a local branch:
git reset origin/master --hard
Be careful though, as the documentation puts it:
Resets the index and working tree. Any changes to tracked files in the working tre...
Change type of varchar field to integer: “cannot be cast automatically to type integer”
I have a small table and a certain field contains the type " character varying ". I'm trying to change it to " Integer " but it gives an error that casting is not possible.
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postgresql - add boolean column to table set default
...s
ADD COLUMN "priv_user" BOOLEAN NOT NULL DEFAULT FALSE;
UPDATE: following is only true for versions before postgresql 11.
As Craig mentioned on filled tables it is more efficient to split it into steps:
ALTER TABLE users ADD COLUMN priv_user BOOLEAN;
UPDATE users SET priv_user = 'f';
ALTER TA...
Using python “with” statement with try-except block
Is this the right way to use the python "with" statement in combination with a try-except block?:
4 Answers
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How to grep a text file which contains some binary data?
...ld run the data file through cat -v, e.g
$ cat -v tmp/test.log | grep re
line1 re ^@^M
line3 re^M
which could be then further post-processed to remove the junk; this is most analogous to your query about using tr for the task.
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What does the “-U” option stand for in pip install -U
Despite a ton of Googling, I can't find any docs for pip's command line options/arguments. What does pip install -U mean? Does anyone have a link to a list of pip's options and arguments?
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