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Make function wait until element exists

I'm trying to add a canvas over another canvas – how can I make this function wait to start until the first canvas is created? ...
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Passing arguments forward to another javascript function

... 5 Answers 5 Active ...
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Verify if a point is Land or Water in Google Maps

..and then Google-maps "divide the waters from the waters" 18 Answers 18 ...
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Remove all special characters, punctuation and spaces from string

I need to remove all special characters, punctuation and spaces from a string so that I only have letters and numbers. 16 A...
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How to determine whether an object has a given property in JavaScript

How can I determine whether an object x has a defined property y , regardless of the value of x.y ? 7 Answers ...
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Footnotes for tables in LaTeX

When I do \footnote{} for a value in a table, the footnote doesn't show up. How do I get it to show up? Also, is it possible to get it to show up at the bottom of the table rather than the bottom of the page? ...
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cleanest way to skip a foreach if array is empty [duplicate]

Not a major problem but I was wondering if there is a cleaner way to do this. It would be good to avoid nesting my code with an unnecessary if statement. If $items is empty php throws an error. ...
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Different types of thread-safe Sets in Java

There seems to be a lot of different implementations and ways to generate thread-safe Sets in Java. Some examples include 4...
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Can I use git diff on untracked files?

Is it possible to ask git diff to include untracked files in its diff output, or is my best bet to use git add on the newly created files and the existing files I have edited, then use: ...
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Is it worthwile to learn assembly language? [closed]

Is it still worthwhile to learn ASM ? 7 Answers 7 ...