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What's quicker and better to determine if an array key exists in PHP?
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@FrancescoPasa Well, "search for the keys" is what PHP documentation says. Other than that, I can't tell if "search" to them means something completely different to what it means to me.
– Rain
Apr 22 at 6:09
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SparseArray vs HashMap
...ypes, even though not all of them are publicly available.
Benefits are:
Allocation-free
No boxing
Drawbacks:
Generally slower, not indicated for large collections
They won't work in a non-Android project
HashMap can be replaced by the following:
SparseArray <Integer, Object>...
When to use single quotes, double quotes, and backticks in MySQL
...delimiter in date strings.
So using your example, I would double-quote the PHP string and use single quotes on the values 'val1', 'val2'. NULL is a MySQL keyword, and a special (non)-value, and is therefore unquoted.
None of these table or column identifiers are reserved words or make use of charac...
boundingRectWithSize for NSAttributedString returning wrong size
...e size that will have the proper height.
UITextView *view=[[UITextView alloc] initWithFrame:CGRectMake(0, 0, width, 10)];
view.text=text;
CGSize size=[view sizeThatFits:CGSizeMake(width, CGFLOAT_MAX)];
height=size.height;
If you are calculating the size in a while loop, do no forg...
How do I convert an enum to a list in C#? [duplicate]
...verytime you call GetValues again with the same enum type, it will have to allocate a new array and copy the values into the new array. That's because arrays might be written to (modified) by the "consumer" of the method, so they have to make a new array to be sure the values are unchanged. .NET 1.0...
How can I compare two dates in PHP?
How can I compare two dates in PHP?
13 Answers
13
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致PHP路上的“年轻人” - 杂谈 - 清泛网 - 专注C/C++及内核技术
致PHP路上的“年轻人”今晚在公司，又与一位刚做PHP工作一年的朋友聊了甚久。他与他们有一样的问题，比较迷茫。而我当年也有他们的困惑。虽然自己也还年轻，但作...今晚在公司，又与一位刚做PHP工作一年的朋友聊了甚久。...
Which $_SERVER variables are safe?
...lett.org/blog/2006/mar/server-name-versus-http-host.
‡ See https://bugs.php.net/bug.php?id=64457, http://httpd.apache.org/docs/current/mod/core.html#usecanonicalphysicalport, http://httpd.apache.org/docs/2.4/mod/core.html#comment_999
Entirely arbitrary user controlled values
These values are no...
Should I pass a shared_ptr by reference? [duplicate]
...t binary size of the executable image a bit due to RTTI stuff, whether the allocation would actually benefit the runtime performance or not. This should not be a problem for desktop/server platforms, but may be a problem for embedded environment with extremely limited resources.
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Is there a way to access an iteration-counter in Java's for-each loop?
...e same object for each iteration. The reason is that all these objects are allocated in eden space only and never life long enough to reach the heap. So allocating them is as fast as e.g. allocating local variables.
– akuhn
Jun 12 '13 at 21:55
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