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either matches a, matches a B, or matches a C); The question mark (?) matches only one arbitrary character; If you use a dash to separate two characters in square brackets, Indicates that all of the two character ranges can be matched (for example [0-9] to match all numbers from 0 to 9).View the new (viewing your staged and unstaged changes) that have been staged and not stagedTo see which parts of a file
1. When using HTML5 canvas elements, it is a good idea for developers to provide a replacement code , given that some browsers do not support canvas elements or do not support some of the features in the HTML5 canvas API.The following code shows how to specify alternate text in the canvas, which is displayed when the browser does not support canvas: 2. Detection of browser supportBefore you create a HTML5 canvas element, make sure that the browser su
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