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capturing self strongly in this block is likely to lead to a retain cycle
...ce: you're not wrong. I interpreted the question to be primarily about the error Xcode presents ("How can I avoid this warning in xcode"), rather than about the actual presence of a retain cycle. You're correct in saying no retain cycle is evident just from the snippet OP provided.
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Print a string as hex bytes?
... the correct format should be {:02x}:
>>> s = "Hello unicode \u0005 !!"
>>> ":".join("{0:x}".format(ord(c)) for c in s)
'48:65:6c:6c:6f:20:75:6e:69:63:6f:64:65:20:5:20:21:21'
^
>>> ":".join("{:02x}".format(ord(c)) for c in s)
'4...
How to convert wstring into string?
...is is deprecated (stackoverflow.com/a/42946556/211176). My compiler throws errors when I try to run this code
– adam_0
Feb 14 '18 at 19:53
6
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How to assert greater than using JUnit Assert?
... greaterThan(Long.parseLong(currentTokenValues[1])));
That gives an error like:
java.lang.AssertionError: timestamp
Expected: a value greater than <456L>
but: <123L> was less than <456L>
share...
How do I get textual contents from BLOB in Oracle SQL
... Doesn't work for me - I get "ORA-06502: PL/SQL: numeric or value error: raw variable length too long". I can put "2000,1" after BLOB_FIELD to get up to 2000 chars, but nothing beyond that.
– Mark
Sep 12 '13 at 13:26
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source command not found in sh shell
I have a script that uses sh shell. I get an error in the line that uses the source command. It seems source is not included in my sh shell.
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预编译头文件来自编译器的早期版本，或者预编译头为 C++ 而在 C 中使用它(...
...切换为“所有配置”。
在“配置属性”---“连接器”---“常规”的“附件库目录”填上库所在的目录名，这个目录名最好是在工程文件夹中建一个专门放lib的文件夹。
C++ 编译器 版本
预编译头文件来自编译器的早期版本，或者预编译头为 C++ 而在 C 中使用它(...
...sp; 在“配置属性”---“连接器”---“常规”的“附件库目录”填上库所在的目录名，这个目录名最好是在工程文件夹中建一个专门放lib的文件夹。
Simultaneously merge multiple data.frames in a list
... also on the link from Ramnath. Looks easy enough. But I get the following error: "Error in match.names(clabs, names(xi)) : names do not match previous names". The variables I'm matching on are all present in all the dataframes in the list, so I'm not catching what this error is telling me.
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Scala: Abstract types vs generics
... def back(x:B):A
}
The compiler will object with bunch of variance check errors
In that case you may gather all type requirements in additional trait and parametrize other traits over it
//one trait to rule them all
trait OO[O <: OO[O]] { this : O =>
type A <: AA[O]
type B <: BB[...