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Calloc simple problem
char* lw; if((lw=(char *)calloc(2, sizeof(char))==0)) printf(\"Failed to allocate.\\n\"); else printf(\"a开发者_开发问答llocated %p\\n\", lw);[详细]
2023-04-04 21:54 分类：问答Null Pointer Exception after checking with 'if' statement
I\'m getting a really annoying error, saying I\'m getting a null pointer exception but there\'s an if statement to check to see if the text is null before proceeding:[详细]
2023-04-04 19:42 分类：问答Why cant I declare a generic list as nullable?
Im trying to use the following code: private Nullable<List<IpAddressRange>> ipAddressRangeToBind;[详细]
2023-04-04 16:33 分类：问答counting vectors with NA included
By mistake, I found that R count vector with NA included in an interesting way: > temp <- c(NA,NA,NA,1) # 4 items[详细]
2023-04-04 13:07 分类：问答Shouldn't Rails find_by_ methods return an empty array instead of nil?
Shouldn\'t Rails find_by_ methods return an empty array instead of nil? It\'s normal for there to be no records that match the find_by_ condition, but returning nil doesn\'t make sense. Because then[详细]
2023-04-04 13:07 分类：问答How does foo(&nil) behave differently than foo(&"not a proc")?
I found out from heckle that [1, 2, 3].each(&nil) doesn\'t cause any errors - it just returns an enumerator.[详细]
2023-04-04 12:46 分类：问答Silverlight: How to force a Control to create itself when not visible?
I know that Silverlight works by not actually creating a physical representation/GUI for a control until it becomes visible.[详细]
2023-04-04 09:47 分类：问答Is there a more concise way to write this Java code?
This foo that is returned by lookup could be null. That\'s why I\'m trying to avoid calling foo.getFooStr() on a null value by first retu开发者_运维问答rning null if foo is null.[详细]
2023-04-04 08:14 分类：问答Setting converter value to null
I have a general function for binding with a converter parameter. When I don\'t need a converter I want to pass in null but it doesn\'t let me it says:[详细]
2023-04-04 05:26 分类：问答ASP.NET [Facebook API] - Reading a signed_request with C# (given only as PHP in fb docs as PHP)
How? I tried everything, I couldn\'t do it. All I see is PHP code, I tried browsing through stackoverflow, tri开发者_如何学编程ed searching online (google, yahoo, etc.), but no where did I find an ans[详细]
2023-04-04 04:33 分类：问答
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