大约有 44,931 项符合查询结果(耗时:0.0504秒) [XML]

https://stackoverflow.com/ques... 

FFMPEG (libx264) “height not divisible by 2”

...ons so this filter will: Divide the original height and width by 2 Round it up to the nearest pixel Multiply it by 2 again, thus making it an even number Add black padding pixels up to this number You can change the color of the padding by adding filter parameter :color=white. See the documentat...
https://stackoverflow.com/ques... 

Echo a blank (empty) line to the console from a Windows batch file [duplicate]

...etter. You can find my original (simplistic and misguided) answer in the edit history. If Microsoft had the intent of providing a means of outputting a blank line from cmd.exe, Microsoft surely would have documented such a simple operation. It is this omission that motivated me to ask this question...
https://stackoverflow.com/ques... 

How can I check for “undefined” in JavaScript? [duplicate]

...terested in finding out whether a variable has been declared regardless of its value, then using the in operator is the safest way to go. Consider this example: // global scope var theFu; // theFu has been declared, but its value is undefined typeof theFu; // "undefined" But this may not be the i...
https://stackoverflow.com/ques... 

What is dynamic programming? [closed]

...Dynamic programming is used a lot in string problems, such as the string edit problem. You solve a subset(s) of the problem and then use that information to solve the more difficult original problem. With dynamic programming, you store your results in some sort of table generally. When you need the...
https://stackoverflow.com/ques... 

Eclipse count lines of code

I've tried the Metrics plugin and although it's nice and all, it's not what my boss is looking for. It counts a line with just one } as a line and he doesn't want that to count as "its not a line, its a style choice". I also need to generate some form of report about the metrics provided. Are th...
https://stackoverflow.com/ques... 

How do I convert a String object into a Hash object?

... by calling Hash#inspect can be turned back into a hash by calling eval on it. However, this requires the same to be true of all of the objects in the hash. If I start with the hash {:a => Object.new}, then its string representation is "{:a=>#<Object:0x7f66b65cf4d0>}", and I can't use e...
https://stackoverflow.com/ques... 

Git SSH error: “Connect to host: Bad file number”

I followed the git guide but I have this strange issue when trying to connect to github: 19 Answers ...
https://stackoverflow.com/ques... 

Is an empty href valid?

... string may be a URI reference. HTML 4.01 HTML 4.01 uses RFC 2396, where it says in section 4.2. Same-document References (bold emphasis mine): A URI reference that does not contain a URI is a reference to the current document. In other words, an empty URI reference within a document is inter...
https://stackoverflow.com/ques... 

What does the “__block” keyword mean?

What exactly does the __block keyword in Objective-C mean? I know it allows you to modify variables within blocks, but I'd like to know... ...
https://stackoverflow.com/ques... 

JS: iterating over result of getElementsByClassName using Array.forEach

I want to iterate over some DOM elements, I'm doing this: 11 Answers 11 ...