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How to get error message when ifstream open fails
...m call that fails update the errno value.
Thus, you can have more information about what happens when a ifstream open fails by using something like :
cerr << "Error: " << strerror(errno);
However, since every system call updates the global errno value, you may have issues in a mult...
OceanBase使用libeasy原理源码分析：客户端 - 数据库(内核) - 清泛网 - 专...
...》，作为客户端使用时，会涉及到一些数据结构，easy_session_t, easy_client_t, easy_hash_t, easy_hash_list_t等。
easy_session_t用来封装一个要发出去的请求，easy_client_t用来封装一个TCP连接的发起端，easy_hash_t是一个哈希表，easy_hash_list_t是采...
iOS: how to perform a HTTP POST request?
I'm approaching iOS development and I'd like to have one of my first applications to perform a HTTP POST request.
7 Answers...
JavaScript: How to find out if the user browser is Chrome?
I need some function returning a boolean value to check if the browser is Chrome .
13 Answers
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How to use NSURLConnection to connect with SSL for an untrusted cert?
...ed API for accomplishing this! Add something like this to your NSURLConnection delegate:
- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace {
return [protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticatio...
How does TestFlight do it?
TestFlight offers over-the-air beta distribution of iOS apps (on non-jailbroken devices). How can this be done? Is this an iOS feature, or a vulnerability exploit?
...
UITextField text change event
...ield control something like this:
// Add a "textFieldDidChange" notification method to the text field control.
In Objective-C:
[textField addTarget:self
action:@selector(textFieldDidChange:)
forControlEvents:UIControlEventEditingChanged];
In Swift:
textField.addTarget(sel...
Continuously read from STDOUT of external process in Ruby
...s in solving this problem of mine. Here are the details, with some explanations, in case anyone having a similar problem finds this page. But if you don't care for details, here's the short answer:
Use PTY.spawn in the following manner (with your own command of course):
require 'pty'
cmd = "blende...
How does Haskell printf work?
...ase, we have no extra arguments, so we need to be able to instantiate r to IO (). For this, we have the instance
instance PrintfType (IO ())
Next, in order to support a variable number of arguments, we need to use recursion at the instance level. In particular we need an instance so that if r is ...
Retrieve version from maven pom.xml in code
What is the simplest way to retrieve version number from maven's pom.xml in code, i.e., programatically?
11 Answers
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