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Use of alloc init instead of new
...selected ones are:
new doesn't support custom initializers (like initWithString)
alloc-init is more explicit than new
General opinion seems to be that you should use whatever you're comfortable with.
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How to determine if a list of polygon points are in clockwise order?
...worked perfectly for my use. Note that if you can plan ahead and spare and extra two vectors in your array, you can get rid of the comparison (or %) by adding the first vector at the tail of the array. That way you simply loop over all the elements, except the last one (length-2 instead of length-1)...
Discuz! X3 论坛标题字数突破80的限制 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...模板中写死的字符限制数：
template\default\forum\post_editor_extra.htm
（一共5处）
修改后代码：
<div class="z">
<!--{if $_GET[action] == 'reply' && !empty($_GET['addtrade']) || $_GET[action] == 'edit' && $thread['special'] == 2 && !$postinfo['first']...
CSS: background image on background color
...e box shadow you can always use a pseudo element for the image without any extra HTML:
.btn{
position: relative;
background-color: #6DB3F2;
}
.btn:before{
content: "";
display: block;
width: 100%;
height: 100%;
position:absolute;
top:0;
left:0;
background-ima...
Using StringWriter for XML Serialization
...lly added <?xml version="1.0" encoding="utf-8"?><test/> to the string, then declaring the SqlParameter to be of type SqlDbType.Xml or SqlDbType.NVarChar would give you the "unable to switch the encoding" error. Then, when inserting manually via T-SQL, since you switched the declared enco...
What is the difference between old style and new style classes in Python?
...I can see of the new-style classes. There is a disadvantage, which is the extra typing of (object).
– recursive
May 3 '11 at 12:45
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Cannot create an NSPersistentStoreCoordinator with a nil model
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This specific issue is caused by creating an extra model version and then attempting to delete it manually while Xcode is open. This causes some kind of corruption. You should not be passing in specific model versions in the momd directory.
– Mike ...
Difference between Hashing a Password and Encrypting it
...sible, you apply the secure hash algorithm and you cannot get the original string back. The most you can do is to generate what's called "a collision", that is, finding a different string that provides the same hash. Cryptographically secure hash algorithms are designed to prevent the occurrence of ...
What's the UIScrollView contentInset property for?
...ntent enough to type into it. With the inset, it is as if the content had extra "BLANK CONTENT" the size of the content inset. Blank text has been "inset" into the real "content" -- that's how I remember the concept.
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Setting DIV width and height in JavaScript
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The onclick attribute of a button takes a string of JavaScript, not an href like you provided. Just remove the "javascript:" part.
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