大约有 40,000 项符合查询结果（耗时：0.0428秒） [XML]
Find document with array that contains a specific value
...tly:
PersonModel.find({ favouriteFoods: "sushi" }, ...);
But I'd also recommend making the string array explicit in your schema:
person = {
name : String,
favouriteFoods : [String]
}
The relevant documentation can be found here: https://docs.mongodb.com/manual/tutorial/query-arrays/
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How can I scroll a web page using selenium webdriver in python?
...e
time.sleep(SCROLL_PAUSE_TIME)
# Calculate new scroll height and compare with last scroll height
new_height = driver.execute_script("return document.body.scrollHeight")
if new_height == last_height:
break
last_height = new_height
another method (thanks to Juanse) is, ...
How do I measure time elapsed in Java? [duplicate]
...k time. You can't use the one for the other purpose. The reason is that no computer's clock is perfect; it always drifts and occasionally needs to be corrected. This correction might either happen manually, or in the case of most machines, there's a process that runs and continually issues small co...
iPhone: How to get current milliseconds?
...ose brackets' are a newer version of the syntax according to stackoverflow.com/q/11474284/209828
– Matthew
Nov 7 '13 at 17:38
121
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Create a string with n characters
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The for loop will be optimized by the compiler. In such cases like yours you don't need to care about optimization on your own. Trust the compiler.
BTW, if there is a way to create a string with n space characters, than it's coded the same way like you just did....
Cannot find executable for CFBundle CertUIFramework.axbundle
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Sep 19 '13 at 8:16
StuartMStuartM
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C# vs C - Big performance difference
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Since you never use 'root', the compiler may have been removing the call to optimize your method.
You could try to accumulate the square root values into an accumulator, print it out at the end of the method, and see what's going on.
Edit : see Jalf's ans...
How do I find the width & height of a terminal window?
...o -e "lines\ncols"|tput -S to get both the lines and cols see: linux.about.com/library/cmd/blcmdl1_tput.htm
– nickl-
Jan 26 '13 at 3:49
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In SQL, how can you “group by” in ranges?
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Better answer at stackoverflow.com/questions/14730380/…
– Thunder
May 27 '15 at 7:24
1
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How do I test for an empty JavaScript object?
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community wiki
14 revs, 14 users 53%Adam Zerner
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