大约有 47,000 项符合查询结果（耗时：0.0634秒） [XML]
Check if a given key already exists in a dictionary
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I fully agree. But if you only need to know if a key exists, or you need to distinguish between a case where the key is defined and a case where you are using a default, in is the best way of doing it.
– Chris B.
Oct 21 '09 at...
How do I copy a hash in Ruby?
I'll admit that I'm a bit of a ruby newbie (writing rake scripts, now). In most languages, copy constructors are easy to find. Half an hour of searching didn't find it in ruby. I want to create a copy of the hash so that I can modify it without affecting the original instance.
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UnicodeDecodeError: 'ascii' codec can't decode byte 0xd1 in position 2: ordinal not in range(128)
... Its the first time I helped someone through here. feels good knowing I helped :)
– Skrmnghrd
Oct 23 '17 at 7:35
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Server is already running in Rails
... After doing this I'm still getting a "Port in use" for 3000. Anyone know how I can fix this? Thanks!
– daveomcd
Jan 12 '14 at 1:48
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Android emulator failed to allocate memory 8
... Seriously, what a stupid bug... /facepalm At least I can progress now! Thank you!
– mrswadge
Nov 9 '13 at 20:01
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Can I query MongoDB ObjectId by date?
I know that ObjectIds contain the date they were created on. Is there a way to query this aspect of the ObjectId?
12 Answer...
Can I create links with 'target=“_blank”' in Markdown?
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Ya know what? I agree with you and alex. I decided not to use _blank at all. It's a better user experience to keep things in one browser. They can just hit back or command-click (Mac user here :)), like you say.
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Showing the same file in both columns of a Sublime Text window
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@MattDMo , I see what you meant now. How do I remove the down vote?
– LED Fantom
Oct 22 '16 at 2:28
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Best way to track onchange as-you-type in input type=“text”?
...eone.
So onkeyup is better for when you want to send what you just typed now.
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How to dynamically insert a tag via jQuery after page load?
... @Reddy Great comment. This was posted in October 2010, I'm sure by now this method is no longer a valid/recommended approach, users have to proceed at their own discretion.
– Bassem
Feb 9 '16 at 23:19
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