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Check whether an input string contains a number in javascript
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matches != null means not undefined or null while matches !== null means specifically not null but passes undefined.
– Nate
Nov 14 '14 at 14:33
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Objective-C: difference between id and void *
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void * means "a reference to some random chunk o' memory with untyped/unknown contents"
id means "a reference to some random Objective-C object of unknown class"
There are additional semantic differences:
Under GC Only or GC Sup...
Implementing Comments and Likes in database
...ringent performance requirements, the third approach is probably the best (meaning the physical tables match 1:1 the entities in the diagram above).
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In Javascript/jQuery what does (e) mean?
... of functions have cropped up with (e) in brackets. Let me show you what I mean:
9 Answers
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What are best practices for REST nested resources?
...artment:
company/{companyid}/department/{departmentid}/employees
Doesn't mean they can't be accessible under company too:
company/{companyid}/employees
Which would return employees for that company. It depends on what is needed by your consuming client - that is what you should be designing fo...
What is the advantage of using REST instead of non-REST HTTP?
...o see how much people disagree on this. As far as I can tell however, REST means this:
Instead of having randomly named setter and getter URLs and using GET for all the getters and POST for all the setters, we try to have the URLs identify resources, and then use the HTTP actions GET, POST, PUT and...
Similar to jQuery .closest() but traversing descendants?
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If by "closest" descendant you mean the first child then you can do:
$('#foo').find(':first');
Or:
$('#foo').children().first();
Or, to look for the first occurrence of a specific element, you could do:
$('#foo').find('.whatever').first();
Or:
$(...
What is the difference between HTML tags and ?
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div is a block element
span is an inline element.
This means that to use them semantically, divs should be used to wrap sections of a document, while spans should be used to wrap small portions of text, images, etc.
For example:
<div>This a large main division, with <s...
CROSS JOIN vs INNER JOIN in SQL
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what do you mean 1 to 1 match? What do you mean "same situation"
– Jwan622
May 18 '18 at 18:24
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SQL JOIN - WHERE clause vs. ON clause
...are functionally the same, in that they produce the same results, does not mean the two kinds of clauses have the same semantic meaning.
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