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Set transparent background using ImageMagick and commandline prompt
...an filtering: mogrify -format png -median 2 -fuzz 5% -transparent white ico_*.jpg
– Tomasz Gandor
Oct 23 '14 at 12:47
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Can I see changes before I save my file in Vim?
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http://vim.wikia.com/wiki/Diff_current_buffer_and_the_original_file
Here is a function and command to see a diff between the currently edited file and its unmodified version in the filesystem. Just put this in your vimrc or in the plugin directory, op...
How do you set your pythonpath in an already-created virtualenv?
... it restored to its original value on deactivate, you could add
export OLD_PYTHONPATH="$PYTHONPATH"
before the previously mentioned line, and add the following line to your bin/postdeactivate script.
export PYTHONPATH="$OLD_PYTHONPATH"
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Java switch statement: Constant expression required, but it IS constant
...ssion to be known at compile time to compile a switch, but why isn't Foo.BA_ constant?
While they are constant from the perspective of any code that executes after the fields have been initialized, they are not a compile time constant in the sense required by the JLS; see §15.28 Constant Expressi...
What is a good Java library to zip/unzip files? [closed]
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/mnt/sdcard/final_unzip_data/Product_images\001GL.JPG: open failed: EINVAL (Invalid argument)
– Smit Patel
Jan 16 '14 at 11:38
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How to print number with commas as thousands separators?
... For Python ≥3.6
Locale aware
import locale
locale.setlocale(locale.LC_ALL, '') # Use '' for auto, or force e.g. to 'en_US.UTF-8'
'{:n}'.format(value) # For Python ≥2.7
f'{value:n}' # For Python ≥3.6
Reference
Per Format Specification Mini-Language,
The ',' option signals the use...
How can one print a size_t variable portably using the printf family?
I have a variable of type size_t , and I want to print it using printf() . What format specifier do I use to print it portably?
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Encoding URL query parameters in Java
...oded / sub-delims / ":" / "@"
unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
pct-encoded = "%" HEXDIG HEXDIG
sub-delims = "!" / "$" / "&" / "'" / "(" / ")" / "*" / "+" / "," / ";" / "="
It also seems that only percent-encoded spaces are valid, as I doubt that space is an ALPHA or a...
YouTube Video Embedded via iframe Ignoring z-index?
...o player" width="480" height="390" src="http://www.youtube.com/embed/lzQgAR_J1PI?wmode=transparent" frameborder="0" wmode="Opaque">
or this
//Fix z-index youtube video embedding
$(document).ready(function (){
$('iframe').each(function(){
var url = $(this).attr("src");
$(thi...
How can I sharpen an image in OpenCV?
...t cannot be replicated? link to the wikipedia has been given above. digital_unsharp_masking to be specific
– tilaprimera
May 2 '14 at 5:35
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