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Merge PDF files
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124
Use Pypdf or its successor PyPDF2:
A Pure-Python library built as a PDF toolkit. It is capa...
Creating an iframe with given HTML dynamically
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123
Setting the src of a newly created iframe in javascript does not trigger the HTML parser until ...
How to convert a ruby hash object to JSON?
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572
One of the numerous niceties of Ruby is the possibility to extend existing classes with your own...
Adjust UILabel height to text
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192
I've just put this in a playground and it works for me.
Updated for Swift 4.0
import UIKit
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ERROR: permission denied for sequence cities_id_seq using Postgres
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Since PostgreSQL 8.2 you have to use:
GRANT USAGE, SELECT ON SEQUENCE cities_id_seq TO www;
GRANT USAGE - For sequences, this privilege allows the use of the currval and nextval functions.
Also as pointed out by @epic_fil in the comments yo...
error: passing xxx as 'this' argument of xxx discards qualifiers
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inline bool operator< (const StudentT & s1, const StudentT & s2)
{
return s1.getId() < s2.getId();
}
Note parameters are now const reference.
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Remove blank lines with grep
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edited Aug 18 '16 at 23:22
James K. Lowden
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a...
Why can't Python's raw string literals end with a single backslash?
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12 Answers
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Convert PDF to image with high resolution
...pdf \
-quality 100 \
-flatten \
-sharpen 0x1.0 \
24-18.jpg
It results in the left image. Compare this to the result of my original command (the image on the right):
(To really see and appreciate the differences between the two, right-click on each and select "Open ...