大约有 47,000 项符合查询结果(耗时:0.0748秒) [XML]

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Chrome, Javascript, window.open in new tab

... I just want to add that by testing in Chrome and FF I found out that using window.open in what you define as a “user initiated event” keeps the browser default action. By that I mean that if in Chrome you hold shift on chrome and click a new browser window will appe...
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UIImagePickerController error: Snapshotting a view that has not been rendered results in an empty sn

I am getting this error only in iOS 7 and the application crashed. In iOS 6, I never get any error, just once of memory warning when opening the camera. ...
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How to calculate an angle from three points? [closed]

... Only a handful of languages use a caret for 'power of', so if you don't want to call it arcos, please just type cos⁻¹. (If you're using a commercial operating system that makes it difficult to type exponents, I expect there would ...
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How to get the build/version number of your Android application?

I need to figure out how to get or make a build number for my Android application. I need the build number to display in the UI. ...
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Python group by

Assume that I have a set of data pair where index 0 is the value and index 1 is the type: 6 Answers ...
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SublimeText encloses lines in white rectangles

It's rather annoying and I can't seem to figure out why. 14 Answers 14 ...
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Is there an online name demangler for C++? [closed]

I'm getting a fairly long and confusing link error, and would love it if I could just paste it into some textbox on some website and have the names un-mangled for me. ...
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Postgres: clear entire database before re-creating / re-populating from bash script

... I'd just drop the database and then re-create it. On a UNIX or Linux system, that should do it: $ dropdb development_db_name $ createdb developmnent_db_name That's how I do it, actually. ...
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What does the thread_local mean in C++11?

I am confused with the description of thread_local in C++11. My understanding is, each thread has unique copy of local variables in a function. The global/static variables can be accessed by all the threads (possibly synchronized access using locks). And the thread_local variables are visible to...
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E11000 duplicate key error index in mongodb mongoose

...nt with the sparse index to filter these null values from the unique index and avoid the error. unique indexes Sparse indexes only contain entries for documents that have the indexed field, even if the index field contains a null value. In other words, a sparse index is ok with multiple documents...