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Difference between >>> and >>
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>> is arithmetic shift right, >>> is logical shift right.
In an arithmetic shift, the sign bit is extended to preserve the signedness of the number.
For example: -2 represented in 8 bits would be 11111110 (because the mo...
Create a CSV File for a user in PHP
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Try:
header("Content-type: text/csv");
header("Content-Disposition: attachment; filename=file.csv");
header("Pragma: no-cache");
header("Expires: 0");
echo "record1,record2,record3\n";
die;
etc
Edit: Here's a snippet of code I use to optionally encode CSV fields:
function maybeEnc...
Force to open “Save As…” popup open at text link click for PDF in HTML
I have some big size PDF catalogs at my website, and I need to link these as download. When I googled, I found such a thing noted below. It should open the " Save As... " popup at link click...
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Keyboard shortcut to change font size in Eclipse?
It is relatively straightforward to change font sizes in Eclipse through preferences (and answered several times in this forum).
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Can hash tables really be O(1)?
It seems to be common knowledge that hash tables can achieve O(1), but that has never made sense to me. Can someone please explain it? Here are two situations that come to mind:
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How to push different local Git branches to Heroku/master
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When using a wildcard, it had to be present on both sides of the refspec, so +refs/heads/*:refs/heads/master will not work. But you can use +HEAD:refs/heads/master:
git config remote.heroku.push +HEAD:refs/heads/master
Also, you can do this dire...
Disabling browser print options (headers, footers, margins) from page?
...s question asked in a couple of different ways on SO and several other websites, but most of them are either too specific or out-of-date. I'm hoping someone can provide a definitive answer here without pandering to speculation.
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Is the practice of returning a C++ reference variable evil?
This is a little subjective I think; I'm not sure if the opinion will be unanimous (I've seen a lot of code snippets where references are returned).
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How do you migrate an IIS 7 site to another server?
I'm wondering what is the best practice for moving a website to another server (along with all settings, etc.)
7 Answers
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Does PNG contain EXIF data like JPG?
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Edit: Version 1.5.0 (July 2017) of the Extensions to the PNG 1.2 Specification has finally added an EXIF chunk. It remains to be seen if encoders-decoders begin to support it.
Original: PNG does not embed EXIF info. It allows,...