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“Diff” an image using ImageMagick
...the same size (image dimension in pixels). The output format is determined by the output filename's extension.
Should you, for some reason, need a higher resolution than the default one (72 dpi) -- then just add an appropriate -density parameter:
compare -density 300 image1 image2 -compose src d...
Difference of keywords 'typename' and 'class' in templates?
... the applicable name
lookup finds a type name or the name
is qualified by the keyword typename.
Example:
typename some_template<T>::some_type
Without typename the compiler can't tell in general whether you are referring to a type or not.
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Merging without whitespace conflicts
...about whitespace and --ignore-space-change was not recognized as an option by git
– Preza8
Aug 28 '19 at 13:10
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show 20 more comments
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Postgresql not creating db with “createdb” as superuser, yet not outputting errors [duplicate]
...s the statement isn't finished and waits for more input. This is indicated by the prompt changing from postgres=# to postgres-#. An extremely subtle change that I wish psql would do differently (more "prominent").
By entering the meta-command \list the "current" SQL statement is "aborted" without ...
How do I include negative decimal numbers in this regular expression?
How do I match negative numbers as well by this regular expression? This regex works fine with positive values, but I want it to also allow negative values e.g. -10, -125.5 etc.
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Generating a unique machine id
...t be aware if you expect it to be a base for security that can be attacked by hardcore hackers.
Of course a registry entry can also be easily changed by anyone to forge a machine GUID, but what I found is that this would disrupt normal operation of so many components of Windows that in most cases n...
Does every web request send the browser cookies?
...okie, and others didn't. That definitely doesn't exist in HTTP/1.1, except by explicitly including them in every request. Honestly, a better (standards-compatible) solution for reducing bandwidth would be client-side gzip content-encoding, but nobody supports that yet.
– Ian Cl...
Text Progress Bar in the Console [closed]
... @MattClimbs This is written for Python 3 which uses UTF-8 encoding by default. You can either change the default fill parameter of the function, which is a UTF-8 character, or use the UTF-8 declaration. See the gist in the comment above for an example of what a UTF-8 declaration should look ...
Creating instance of type without default constructor in C# using reflection
...will create an instance without calling a constructor. I found this class by using Reflector and digging through some of the core .Net serialization classes.
I tested it using the sample code below and it looks like it works great:
using System;
using System.Collections.Generic;
using System.Li...
The difference between the 'Local System' account and the 'Network Service' account?
...has access to resources that have been explicitly granted to 'anonymous' - by default, nothing.
– david
May 13 '16 at 11:03
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