do_trucate in jinja2, correct usage needed [closed] - flask

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I think I saw something on using this to truncate test as a filter, but I've seen to no idea how to use it. Using as xx|do_trucate(20) gives the following:
TemplateAssertionError: no filter named 'do_truncate'
What is the correct usage?

Doh, from the spec I saw
do_trucate
http://code.nabla.net/doc/jinja2/api/jinja2/jinja2.filters.html
But in reality, its just truncate

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How to change comma to period when typing double number in TextField? [closed]

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Closed 3 days ago.
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How to change comma to period when typing double number in TextField?

What does ch!=?.? mean in c++ [closed]

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Closed 1 year ago.
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This is used here do {....} while(ch!=?.?); what does ch!=?.? mean here can anybody please help with it.
It's a syntax error with both clang and gcc.
#JonathanLeffler is usually right and I think he nailed the root cause. I used to see this when text was being copied from Microsoft Word to the web (lack of transcode from a Windows code page to ascii/utf8?).

why does [[:xdigit:]] highlight letter e in grep results? [closed]

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Closed 2 years ago.
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Why does below command highlight e as well with digits?
grep '[[:xdigit:]]' search.txt
This is intended, as it searches for hexadecimal digits.
The man-page states:

C++ error: decomposition declaration not permitted in this context [closed]

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Closed 4 years ago.
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Why is g++ giving an error like this?
blahblah.h:80:10: error: decomposition declaration not permitted in this context
float[NUM_OUTPUTS] output_buffer;
(Already solved, but creating this because there's no good google hits for this error text, and the error message is inscrutable.)
In C++ declarations, the array size goes after the variable name, not after the type:
float output_buffer[NUM_OUTPUTS];

python: check if all elements the same in an list [closed]

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Closed 6 years ago.
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I am using the following code to check if all the elements in a list are the same:
def sameItem(myList):
return all(x==myList[0] for x in myList)
However, in my test case:
myL1 = ['dog','cat','dog']
sameItem(myL1)
returns True. Shouldn't it be False? Or did I have a bug in the sameItem() function?
Also, I am using Jupyter Notebook, could it cause any problem is this scenario?
Thanks!
Your method should be correct and works for me. As an alternative, you can try this method to double check, which is a one line that does the same thing
return myList[1:] == myList[:-1]