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Objective-C: Where to remove observer for NSNotification?
I have an objective C class. In it, I created a init method and set up a NSNotification in it
14 Answers
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How do I check if an object has a specific property in JavaScript?
...king for. If you want to know if an object physically contains a property (and it is not coming from somewhere up on the prototype chain) then object.hasOwnProperty is the way to go. All modern browsers support it. (It was missing in older versions of Safari - 2.0.1 and older - but those versions of...
在 App Inventor 2 中使用图像 · App Inventor 2 中文网
...ke:
Failed to allocate a 25165836 byte allocation with 3395432 free bytes and 3MB until OOM
What’s happening here is that the app is is running out of memory (OOM). In the case of the message above, the phone is trying to allocate 25 megabytes (25165836 bytes) but there are only 3 megabytes (33...
Where does the iPhone Simulator store its data?
I have a SQLite DB that I'm using to store app data, and I could do with taking a look inside it to debug a problem I'm having - but where does the iPhone Simulator store its data, typically?
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What is the difference between NULL, '\0' and 0?
...e appear to be differences between various values of zero -- NULL , NUL and 0 .
11 Answers
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Better way of getting time in milliseconds in javascript?
...sking this because I am trying to make a simple game engine in JavaScript, and when calculating the "delta frame time", I have to create a new Date object every frame. While I am not too worried about the performance implications of this, I am having some problems with the reliability of the exact t...
jQuery get value of select onChange
...hat I could get the value of a select input by doing this $(this).val(); and applying the onchange parameter to the select field.
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CSS3 background image transition
...ound-image 0.2s ease-in-out;
This is supported natively by Chrome, Opera and Safari. Firefox hasn't implemented it yet (bugzil.la). Not sure about IE.
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How to create a temporary directory?
I use to create a tempfile , delete it and recreate it as a directory:
4 Answers
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How to form tuple column from two columns in Pandas
I've got a Pandas DataFrame and I want to combine the 'lat' and 'long' columns to form a tuple.
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