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常用Sql - 爬虫/数据库 - 清泛IT社区，为创新赋能！
...) NOT NULL COMMENT '递增ID',
`FIELD_1` varchar(32) NOT NULL COMMENT '字段1',
`FIELD_2` ...
How to do URL decoding in Java?
...alue came from JDK's own StandardCharsets
}
Java 10 added direct support for Charset to the API, meaning there's no need to catch UnsupportedEncodingException:
String result = java.net.URLDecoder.decode(url, StandardCharsets.UTF_8);
Note that a character encoding (such as UTF-8 or ASCII) is wha...
How can I programmatically determine if my app is running in the iphone simulator?
... a very different title.
What #defines are set up by Xcode when compiling for iPhone
I'll repeat my answer from there:
It's in the SDK docs under "Compiling source code conditionally"
The relevant definition is TARGET_OS_SIMULATOR, which is defined in /usr/include/TargetConditionals.h within the...
Getting multiple keys of specified value of a generic Dictionary?
...;
}
return new List<TSecond>(list); // Create a copy for sanity
}
public IList<TFirst> GetBySecond(TSecond second)
{
IList<TFirst> list;
if (!secondToFirst.TryGetValue(second, out list))
{
return EmptyFirstList;
...
Defining a function with multiple implicit arguments in Scala
...ing)(implicit ii: Int): (String,Int)= (s,ii)
// The basic implicit values for both underlying parameters
implicit val iString = " world! "
implicit val iInt = 2019
myFun("Hello")
myFun("Hello")(" my friend! ")
myFun("Hello")(" my friend! ",2020)
// Output is:
// Hello world! 2019
// Hello...
How to compare times in Python?
...fixed, recurring event (8am happens every day).
You can check if now is before or after today's 8am:
>>> import datetime
>>> now = datetime.datetime.now()
>>> today8am = now.replace(hour=8, minute=0, second=0, microsecond=0)
>>> now < today8am
True
>>&g...
Wait for page load in Selenium
How do you make Selenium 2.0 wait for the page to load?
47 Answers
47
...
How do I add a margin between bootstrap columns without wrapping [duplicate]
...
I was facing the same issue; and the following worked well for me. Hope this helps someone landing here:
<div class="row">
<div class="col-md-6">
<div class="col-md-12">
Set room heater temperature
</div>
</div>
&...
Encode String to UTF-8
... @Peter: true. But attaching an encoding to it only makes sense for byte[], it doesn't make sense for String (unless the encoding is UTF-16, in which case it makes sense but it still unnecessary information).
– Joachim Sauer
Apr 20 '11 at 14:36
...
Iterate a list as pair (current, next) in Python
...a, b = itertools.tee(iterable)
next(b, None)
return zip(a, b)
For Python 2, you need itertools.izip instead of zip:
import itertools
def pairwise(iterable):
"s -> (s0,s1), (s1,s2), (s2, s3), ..."
a, b = itertools.tee(iterable)
next(b, None)
return itertools.izip(a, b...