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sed beginner: changing all occurrences in a folder

I need to do a regex find and replace on all the files in a folder (and its subfolders). What would be the linux shell command to do that? ...
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How to count duplicate value in an array in javascript

...eturns the value of counts[x] if it is set, otherwise 0. Then just add one and set it again in the object and the count is done. – Constantinius Feb 7 '17 at 11:52 1 ...
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Animated GIF in IE stopping

... not work for me. After some more research I came across this workaround, and it actually does work. Here is the gist of it: function showProgress() { var pb = document.getElementById("progressBar"); pb.innerHTML = '<img src="./progress-bar.gif" width="200" height ="40"/>'; pb.s...
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When would anyone use a union? Is it a remnant from the C-only days?

...pace to work with, or when you're developing an API (or something similar) and you want to force the end user to have only one instance of several objects/types at one time. Are these two guesses even close to right? ...
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Receiving “fatal: Not a git repository” when attempting to remote add a Git repo

....git folder is gone. Is git init the same as delete the repository folder, and then git clone .... All I need to do is a pull – Francisco Corrales Morales May 5 '14 at 21:34 3 ...
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Maximum Java heap size of a 32-bit JVM on a 64-bit OS

... OS, given that 32-bit OSes have a maximum addressable memory size of 4GB, and that the JVM's max heap size depends on how much contiguous free memory can be reserved. ...
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Is volatile expensive?

...LoadLoad or a LoadStore barrier. Further down the page I see that LoadLoad and LoadStore are effectively no-ops on X86 CPUs. Does this mean that volatile read operations can be done without a explicit cache invalidation on x86, and is as fast as a normal variable read (disregarding the reordering co...
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Automatic counter in Ruby for each?

I want to use a for-each and a counter: 8 Answers 8 ...
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What exactly does big Ө notation represent?

I'm really confused about the differences between big O, big Omega, and big Theta notation. 6 Answers ...
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Rounded UIView using CALayers - only some corners - How?

...the answer over at How do I create a round cornered UILabel on the iPhone? and the code from How is a rounded rect view with transparency done on iphone? to make this code. Then I realized I'd answered the wrong question (gave a rounded UILabel instead of UIImage) so I used this code to change it:...