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What is the difference between Serializable and Externalizable in Java?

... We used Externalizable for large collections of "selected IDs" -- it was far more efficient externalizing as more-or-less a count & an array of primitive ints, than default serialization. That's a very simple usecase, nothing "special" or "unique". ...
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Simple way to find if two different lists contain exactly the same elements?

...) because we are doing O(2*n) insertions into a hashmap and O(3*n) hashmap selects. I have not fully tested this code, so beware :) //Returns true: listsAreEquivelent(Arrays.asList("A","A","B"),Arrays.asList("B","A","A")); listsAreEquivelent(null,null); //Returns false: listsAreEquivelent(Arrays.as...
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Can I stretch text using CSS?

... This is great, but unfortunately it doesn’t work with a pseudoselector such as ::first-letter. – Simone Dec 14 '18 at 17:07  |  s...
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Create tap-able “links” in the NSAttributedString of a UILabel?

...tureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapOnLabel:)]]; Now the most sophisticated stuff: finding out whether the tap was on where the link is displayed and not on any other portion of the label. If we had single-lined UILabel, this task could be ...
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“java.lang.OutOfMemoryError: PermGen space” in Maven build [duplicate]

... They can even use JAVA_1_8_HOME which would emulate a poor mens toolchain selector) – eckes Mar 16 '16 at 23:25 the b...
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How do I add a ToolTip to a control?

... Add a ToolTip component to your form Select one of the controls that you want a tool tip for Open the property grid (F4), in the list you will find a property called "ToolTip on toolTip1" (or something similar). Set the desired tooltip text on that property. Rep...
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Android: Generate random color on click?

... This approach might not yield the best results, It always ends up with a selection of similar colors that way too dark or way too bright. Semi-random approach : If you need some fresh and shiny colors then use the following simple class, that I wrote previously when I had the same issues. It's ...
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How to terminate a window in tmux?

...nd . command-prompt bind a last-window bind space command-prompt -p index "select-window" bind r source-file ~/.tmux.conf # Options set -g bell-action none set -g set-titles on set -g set-titles-string "tmux (#I:#W)" set -g base-index 1 set -g status-left "" set -g status-left-attr bold set -g stat...
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What is the most accurate way to retrieve a user's correct IP address in PHP?

...and anonymous proxy servers is just something I'll have to deal with for a select group of individuals. – Corey Ballou Oct 28 '09 at 10:04 ...
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Regex: Remove lines containing “help”, etc

.... Make sure the Regular expression radio button in the Search Mode area is selected. Then click Replace All and voila! All lines containing your search term help have been removed. share | improv...