大约有 3,516 项符合查询结果（耗时：0.0192秒） [XML]
Join strings with a delimiter only if strings are not null or empty
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For those who are interested in an efficient solution working in a wide range of browsers (including IE 5.5 - 8) and which doesn't require jQuery, see below:
var join = function (separator /*, strings */) {
// Do not use:
// var args = Array.prototype.slice.call(arguments, 1);
/...
Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
...ngs in a database can have a length of zero characters, so the permissible range of lengths when the length is stored in eight bits is between 0 and 255. If you wanted to say that strings all must have at least one character then you could support 256-character strings with an eight-bit length.
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How to efficiently concatenate strings in go
...ertainly not b.N), and do all the concatenation inside the body of the for ranging to b.N (that is, 2 for loops embedded).
– icza
Dec 4 '15 at 8:01
18
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When should I use uuid.uuid1() vs. uuid.uuid4() in python?
...oduce several per second on the same node. Example: [uuid.uuid1() for i in range(2)]. Unless of course something strange is going on that I'm missing.
– Michael Mior
Nov 16 '13 at 4:14
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How to change font size on part of the page in LaTeX?
... fontsize you can use following. Worked for me since in my case predefined ranges (Large, tiny) are not match with the font size required to me.
\fontsize{10}{12}\selectfont This is the text you need to be in 10px
More info: https://tug.org/TUGboat/tb33-3/tb105thurnherr.pdf
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Why is it important to override GetHashCode when Equals method is overridden?
... the fields in the class, but since you know your object's domain or value ranges you could still provide a better one.
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How to switch position of two items in a Python list?
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for i in range(len(arr)):
if l[-1] > l[i]:
l[-1], l[i] = l[i], l[-1]
break
as a result of this if last element is greater than element at position i then they both get swapped .
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Why does MYSQL higher LIMIT offset slow the query down?
...id LIMIT X,Y.
I have 35million of rows so it took like 2 minutes to find a range of rows.
Here is the trick :
select id, name, address, phone
FROM customers
WHERE id > 990
ORDER BY id LIMIT 1000;
Just put the WHERE with the last id you got increase a lot the performance. For me it was from 2m...
What is a faster alternative to Python's http.server (or SimpleHTTPServer)?
...advantage of twisted one line server, it support resumable downloads (byte range support), and that is a must have feature when you are downloading large files.
– Pankaj
Nov 10 '13 at 6:38
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What is the difference between svg's x and dx attribute?
...idth: 1; stroke: lightgray; }
</style>
<script>
dataset = d3.range(50,500,50);
svg = d3.select("body").append("svg");
svg.attr('width',500).attr('height', 500);
svg.append("line").attr('x1', 0).attr('x2', 500).attr('y1', 100).attr('y2', 100);
svg.append("line").attr('x1', 0).attr('x2...