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...赖有多么敏感。我们把这种情况称为实时数据处理（what if analysis）。LINGO有一个特征可方便地做到这件事。
在本该放数的地方输入一个问号（?）。
例3.5
data:
interest_rate,inflation_rate = .085 ?;
enddata
每一次求解模型时，LINGO都...
YYYY-MM-DD format date in shell script
...e
# -1 -> explicit current date, bash >=4.3 defaults to current time if not provided
# -2 -> start time for shell
printf -v date '%(%Y-%m-%d)T\n' -1
# put current date as yyyy-mm-dd HH:MM:SS in $date
printf -v date '%(%Y-%m-%d %H:%M:%S)T\n' -1
# to print directly remove -v flag, as such...
iPhone viewWillAppear not firing
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If you use a navigation controller and set its delegate, then the view{Will,Did}{Appear,Disappear} methods are not invoked.
You need to use the navigation controller delegate methods instead:
navigationController:willShowVi...
How can I convert a string to a number in Perl?
...ope [rabdelaz@Linux_Desktop:~/workspace/akatest_5]$perl -e 'print "nope\n" if "1,000" > 10;'
– Ramy
May 22 '14 at 15:24
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A regex to match a substring that isn't followed by a certain other substring
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Yes. I can use what I have now, but it would be easier if I could just match bot but not botters. I'm very sorry. I'm inexperienced with regexes, and I'm afraid I'm slowly figuring out what I want myself. :p
– Rayne
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Convert an NSURL to an NSString
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In Objective-C:
NSString *myString = myURL.absoluteString;
In Swift:
var myString = myURL.absoluteString
More info in the docs:
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fo...
Is it possible to specify the schema when connecting to postgres with JDBC?
Is it possible? Can i specify it on the connection URL? How to do that?
9 Answers
9
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Detecting 'stealth' web-crawlers
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bots can execute Javascript now...it's 2013 for christ sakes. so there goes the whole argument. who says web crawlers visits sites in sequential selections? another huge assumption.
– KJW
Oct 9 '13 at 0:34
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Get the IP address of the machine
...ires that you choose a specific external host. Most of the time, any well-known public IP should do the trick. I like Google's public DNS server address 8.8.8.8 for this purpose, but there may be times you'd want to choose a different external host IP. Here is some code that illustrates the full app...
How to print the full NumPy array, without truncation?
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if you only want to print a numpy array only once, unfortunately this solution has the downside of requiring you to reset this configuration change after doing the print.
– Trevor Boyd Smith
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