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Most efficient way to store thousand telephone numbers

This is a google interview question: 13 Answers 13 ...
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Why does jQuery or a DOM method such as getElementById not find the element?

... to the DOM and scripts are (generally) executed as they're encountered. This means that order matters. Typically, scripts can't find elements which appear later in the markup because those elements have yet to be added to the DOM. Consider the following markup; script #1 fails to find the <div&...
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Is !important bad for performance?

...CSS parser at /source/layout/style/nsCSSDataBlock.cpp#572 and I think that is the relevant routine, handling overwriting of CSS rules. it just seems to be an simple check for "important". if (aIsImportant) { if (!HasImportantBit(aPropID)) changed = PR_TRUE; SetImportantBit(aPropID)...
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How do you use the ? : (conditional) operator in JavaScript?

Can someone please explain to me in simple words what is the ?: (conditional, "ternary") operator and how to use it? 18 ...
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Test whether string is a valid integer

...e script does one thing, and if not valid, it does something else. Trouble is, I haven't found an easy (and reasonably elegant) way of doing this - I don't want to have to pick it apart char by char. ...
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Conditional formatting based on another cell's value

I'm using Google Sheets for a daily dashboard. What I need is to change the background color of cell B5 based on the value of another cell - C5. If C5 is greater than 80% then the background color is green but if it's below, it will be amber/red. ...
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Delete multiple records using REST

What is the REST-ful way of deleting multiple items? 5 Answers 5 ...
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How to check that an object is empty in PHP?

How to find if an object is empty or not in PHP. 11 Answers 11 ...
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Putting license in each code file? [closed]

... share | improve this answer | follow | edited Sep 10 '18 at 10:57 Michael Dorner 10.6k101...
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What is the maximum length of a valid email address?

What is the maximum length of a valid email address? Is it defined by any standard? 6 Answers ...