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Removing all empty elements from a hash / YAML?

...mplementation is not recursive. As a curiosity, they implemented it using #select instead of #delete_if for performance reasons. See here for the benchmark. In case you want to backport it to your Rails 3 app: # config/initializers/rails4_backports.rb class Hash # as implemented in Rails 4 # ...
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Insert auto increment primary key to existing table

...etrieve it by id immediately, MySQL offers LAST_INSERT_ID() for that value SELECT * FROM table_name WHERE id = LAST_INSERT_ID() and most programming language APIs offer some function/method to return that value in the application code. – Michael Berkowski Jan 2...
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Why is lazy evaluation useful?

... @Viclib A selection algorithm for finding the top k elements out of n is O(n + k log k). When you implement quicksort in a lazy language, and only evaluate it far enough to determine the first k elements (stopping evaluation after), i...
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Custom Cell Row Height setting in storyboard is not responding

...cally because this answer applies to Interface Builder/Storyboards. If you select the cell in IB, then the Size Inspector shows Row Height at the top (with a "custom" checkbox), but if you select the whole table view the Size Inspector shows Row Height at the top there too (no "custom" in this case)...
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Vim: Replacing a line with another one yanked before

... Vp: select line, paste what was yanked share | improve this answer | follow | ...
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Why does jQuery or a DOM method such as getElementById not find the element?

...for document.getElementById , $("#id") or any other DOM method / jQuery selector not finding the elements? 9 Answers ...
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How do you automatically set text box to Uppercase?

...ly expanded version should resolve that <input oninput="let p=this.selectionStart;this.value=this.value.toUpperCase();this.setSelectionRange(p, p);" /> share | improve this answer ...
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Turn off textarea resizing

... As per the question, i have listed the answers in javascript By Selecting TagName document.getElementsByTagName('textarea')[0].style.resize = "none"; By Selecting Id document.getElementById('textArea').style.resize = "none"; ...
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w3wp process not found

... GoTo Web Project properties -> Select (Web) on the left sidebar -> GoTo under (Servers) header -> Click to dropdown and select "Local IIS" and apply. Then, when you start debugging you will see w3wp.exe on the proccess list. ...
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File Explorer in Android Studio

...en robot icon on the toolbar, to the left of the help icon). From the ADM, select the device/emulator, then select the File Explorer tab. share | improve this answer | follow...