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What is the difference between LL and LR parsing?
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At a high level, the difference between LL parsing and LR parsing is that LL parsers begin at the start symbol and try to apply productions to arrive at the target string, whereas LR parsers begin at the target string and try to arrive back at the start symbol.
An LL parse i...
How to initialize HashSet values by construction?
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There is a shorthand that I use that is not very time efficient, but fits on a single line:
Set<String> h = new HashSet<>(Arrays.asList("a", "b"));
Again, this is not time efficient since you are constructing an array, converti...
Difference between Convert.ToString() and .ToString()
What is the difference between Convert.ToString() and .ToString() ?
19 Answers
19
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What is the difference between the dot (.) operator and -> in C++? [duplicate]
What is the difference between the dot (.) operator and -> in C++?
14 Answers
14
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When to use IMG vs. CSS background-image?
...TML IMG tag to display an image, as opposed to a CSS background-image , and vice-versa?
31 Answers
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Google Sheets API Setup · App Inventor 2 中文网
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Note: If you are only going to read from the Google Sheets document, and not
edit or write data to the document, you can skip the process of making a Service
Account. The only requirement is that the Google Sheets document is shared such
that anyone with the link can read the document.
Create...
Is there are way to make a child DIV's width wider than the parent DIV using CSS?
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how about another parent div being position:static, and another div inside with position:relative? jsfiddle.net/blowsie/v2Tja/3
– Blowsie
Apr 7 '11 at 15:20
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Detect if an input has text in it using CSS — on a page I am visiting and do not control?
... input has text in it via CSS? I've tried using the :empty pseudo-class, and I've tried using [value=""] , neither of which worked. I can't seem to find a single solution to this.
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JSON left out Infinity and NaN; JSON status in ECMAScript?
Any idea why JSON left out NaN and +/- Infinity? It puts Javascript in the strange situation where objects that would otherwise be serializable, are not, if they contain NaN or +/- infinity values.
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How can I check if a URL exists via PHP?
...t Found') {
$exists = false;
}
else {
$exists = true;
}
From here and right below the above post, there's a curl solution:
function url_exists($url) {
return curl_init($url) !== false;
}
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