当我尝试从较大的字符串中提取字符串时,它会给出范围或索引超出范围的错误.我可能会忽略一些非常明显的东西.谢谢.
NSString *title = [TBXML textForElement:title1];
TBXMLElement * description1 = [TBXML childElementNamed:@"description" parentElement:item1];
NSString *description = [TBXML textForElement:description1];
NSMutableString *des1 = [NSMutableString stringWithString:description];
//search for <pre> tag for its location in the string
NSRange match;
NSRange match1;
match = [des1 rangeOfString: @"<pre>"];
match1 = [des1 rangeOfString: @"</pre>"];
NSLog(@"%i,%i",match.location,match1.location);
NSString *newDes = [des1 substringWithRange: NSMakeRange (match.location+5, match1.location-1)]; //<---This is the line causing the error
NSLog(@"title=%@",title);
NSLog(@"description=%@",newDes);
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更新:范围的第二部分是长度,而不是端点.D'哦!
我正在研究一个可以通过网络访问的python脚本,因此会有多个用户试图同时附加到同一个文件.我担心这可能导致竞争条件,如果多个用户同时写入同一文件,它可能会损坏文件.
例如:
#!/usr/bin/env python
g = open("/somepath/somefile.txt", "a")
new_entry = "foobar"
g.write(new_entry)
g.close
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我是否必须使用锁定文件,因为此操作看起来很危险.
python concurrency simultaneous text-files simultaneous-calls
我正在尝试从ASIHttpRequest转换为AFNetworking,但我似乎在我班级的以下行中有"使用未声明的标识符AFURLSessionManager"错误.
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
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我在标题中包含以下内容:
#import "AFNetworking.h"
#import "AFURLSessionManager.h"
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它必须是非常明显的东西,但现在脑屁不好.
您是否知道Traefik日志位于何处?我阅读了Traefik上的文档,并说它将输出到stdout,但是当docker-compose up -d我尝试使用域名并拉出多个链接的docker容器后,当我使用它启动docker容器时,stdout中没有显示任何内容。
我也尝试指定这些:
[traefikLog]
filePath = "./traefik.log" #<--Tried this but It doesn't work, file empty and permissions set to 777
[accessLog]
filePath = "./access.log" #<--Tried this but doesn't work, file empty and permissions set to 777
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我很困惑,我错过了什么吗?还是Traefik应该这么安静?
当我运行它时,这就是我所看到的,此后什么也没有。
# docker-compose up
Creating traefik ... done
Attaching to traefik
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附件是我的配置。谢谢。
traefik / traefik.toml:
logLevel = "DEBUG"
defaultEntryPoints = ["http","https"]
[api]
address = ":8080"
[traefikLog]
filePath = "./traefik.log" #<--Tried this but It doesn't work
[accessLog]
filePath = "./access.log" #<--Tried …Run Code Online (Sandbox Code Playgroud) objective-c ×2
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