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What is the difference between single-quoted and double-quoted strings in PHP?

...uotes in this syntax. Nowdoc (since PHP 5.3.0) string syntax works essentially like single quoted strings. The difference is that not even single quotes or backslashes have to be escaped. A nowdoc is identified with the same <<< sequence used for heredocs, but the identifier which follows ...
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How do you detect Credit card type based on number?

...rds; there are other cards issued using the MasterCard system that do not fall into this IIN range. In 2016, they will add numbers in the range (222100-272099). American Express: ^3[47][0-9]{5,}$ American Express card numbers start with 34 or 37. Diners Club: ^3(?:0[0-5]|[68][0-9])[0-9]{4,}$ Dine...
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How to Implement DOM Data Binding in JavaScript

...ake this work, your object needs to implement the eventListener interface. All that's needed to accomplish this is to give the object a handleEvent() method. That's where the inheritance comes in. MyCtor.prototype.handleEvent = function(event) { switch (event.type) { case "change": th...
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Difference between thread's context class loader and normal classloader

... Indeed, not all classloaders have a classpath. When wrote "ClassB needs to be on the classpath of the classloader of ClassA", I meant "ClassB needs to loadable by the classloader of ClassA". 90% of the time they mean the same. But if ...
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Putting license in each code file? [closed]

...uisance to have the actual licence text in the file, but it's a judgement call. But it is sensible to identify which licence it's released under. – Jonathan Leffler May 10 '09 at 20:43 ...
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How to test multiple variables against a value?

...lish sentence and guess that you are talking about the same comparison for all names here. You are looking for: if x == 1 or y == 1 or z == 1: x and y are otherwise evaluated on their own (False if 0, True otherwise). You can shorten that using a containment test against a tuple: if 1 in (x, y,...
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How to saveHTML of DOMDocument without HTML wrapper?

... All of these answers are now wrong, because as of PHP 5.4 and Libxml 2.6 loadHTML now has a $option parameter which instructs Libxml about how it should parse the content. Therefore, if we load the HTML with these options ...
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Using .otf fonts on web browsers

...orking on a website that requires font trials online, the fonts I have are all .otf 2 Answers ...
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Common xlabel/ylabel for matplotlib subplots

... This looks like what you actually want. It applies the same approach of this answer to your specific case: import matplotlib.pyplot as plt fig, ax = plt.subplots(nrows=3, ncols=3, sharex=True, sharey=True, figsize=(6, 6)) fig.text(0.5, 0.04, 'common X...
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Java multiline string

... Furthermore, the first version will be automatically concatenated by the compiler, since all the strings are known at compile time. Even if the strings are not known at compile time, it's no slower than StringBuilder or String.format(). The only reason to avoid concatenati...