大约有 47,000 项符合查询结果（耗时：0.0464秒） [XML]
sed one-liner to convert all uppercase to lowercase?
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@ekkis OSX is using BSD (as mentioned, BSD sed doesn't support it). Try reading the top line of man sed to know which version you're using.
– Ryder
Dec 8 '17 at 10:48
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RegEx to parse or validate Base64 data
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^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$
This one is good, but will match an empty String
This one does not match empty string :
^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$
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Determine if a String is an Integer in Java [duplicate]
...better.
str.matches("-?\\d+");
-? --> negative sign, could have none or one
\\d+ --> one or more digits
It is not good to use NumberFormatException here if you can use if-statement instead.
If you don't want leading zero's, you can just use the regular expression as follow:
str....
ggplot with 2 y axes on each side and different scales
...ed to plot a bar chart showing counts and a line chart showing rate all in one chart, I can do both of them separately, but when I put them together, I scale of the first layer (i.e. the geom_bar ) is overlapped by the second layer (i.e. the geom_line ).
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Is there a predefined enumeration for Month in the .NET library?
...us cultures have different monthly calendars, but there's (apparently) not one that has a different number of days per week. So the number of days per week is consistent even if the names aren't.
– Ryan Lundy
Jan 12 '10 at 19:58
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Is there a way for multiple processes to share a listening socket?
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So for one connection, either parent or child gets it. But who gets the connection is indeterministic, right?
– Hot.PxL
May 2 '15 at 5:36
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JavaScript query string [closed]
...mp;]*)/g, m;
while (m = re.exec(queryString)) {
result[decodeURIComponent(m[1])] = decodeURIComponent(m[2]);
}
return result;
}
// ...
var myParam = getQueryString()["myParam"];
share
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MySQL vs PostgreSQL for Web Applications [closed]
...ation against both." And if you really, really care, you get in two DBAs (one who specializes in each database) and get them to tune the crap out of the databases, and then choose. It's astonishing how expensive good DBAs are; and they are worth every cent.
When it matters.
Which it probably...
Basic HTTP authentication with Node and Express 4
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const [login, password] = ...split() is just two var assignments in one
source of inspiration (uses packages)
The above is a super simple example that was intended to be super short and quickly deployable to your playground server. But as was pointed out in the comments, passwords can also...
Java 8: How do I work with exception throwing methods in streams?
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You need to wrap your method call into another one, where you do not throw checked exceptions. You can still throw anything that is a subclass of RuntimeException.
A normal wrapping idiom is something like:
private void safeFoo(final A a) {
try {
a.foo();
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