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The Concept of 'Hold space' and 'Pattern space' in sed
I'm confused by the two concepts in sed: hold space and pattern space. Can someone help explain them?
3 Answers
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JS strings “+” vs concat method [duplicate]
I have some experience with Java and I know that strings concatenation with "+" operator produces new object.
5 Answers
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Switch statement for string matching in JavaScript
...you don't want to compare in your match, you don't need a substring match, and could do:
switch (base_url_string) {
case "xxx.local":
// Blah
break;
case "xxx.dev.yyy.com":
// Blah
break;
}
...but again, that only works if that's the complete string you're ...
Generate .pem file used to set up Apple Push Notifications
I tried and tried to generate a .pem file, every time generating certificates from the client's account and then generating the .pem file using the terminal, but it's of no use. Can anyone give a step-by-step procedure?
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What is the ultimate postal code and zip regex?
I'm looking for the ultimate postal code and zip code regex. I'm looking for something that will cover most (hopefully all) of the world.
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Set transparent background using ImageMagick and commandline prompt
Suppose you have any image (PNG or JPG).
This image has a white background and I need to make this background transparent.
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Order Bars in ggplot2 bar graph
...g to make a bar graph where the largest bar would be nearest to the y axis and the shortest bar would be furthest. So this is kind of like the Table I have
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Can I run javascript before the whole page is loaded?
...er encounters a classic script tag when parsing the HTML, it stops parsing and hands over to the JavaScript interpreter, which runs the script. The parser doesn't continue until the script execution is complete (because the script might do document.write calls to output markup that the parser should...
python re.sub group: number after \number
...r')
Relevant excerpt from the docs:
In addition to character escapes and
backreferences as described above,
\g will use the substring
matched by the group named name, as
defined by the (?P...) syntax.
\g uses the corresponding
group number; \g<2> is therefore
equivalent to ...
Unable to export Apple production push SSL certificate in .p12 format
...o private key was created for the certificate. When I tried to right click and export the certificate, I was not able to export that as .p12 file as the .p12 file extension was disabled while saving. I am unable to attach the screenshots here due to lesser reputation.
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