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Converting NSString to NSDate (and back again)
...String = @"01-02-2010";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"dd-MM-yyyy"];
NSDate *dateFromString = [dateFormatter dateFromString:dateString];
NSDate convert to NSString:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[d...
Convert UTF-8 encoded NSData to NSString
...ated, you should use -initWithData:encoding:
NSString* newStr = [[NSString alloc] initWithData:theData encoding:NSUTF8StringEncoding];
If the data is null-terminated, you should instead use -stringWithUTF8String: to avoid the extra \0 at the end.
NSString* newStr = [NSString stringWithUTF8String:[t...
Regular expression to match URLs in Java
...ly bug in Java 6 RegEx...
Simplest/Fastest solution would be to use StringTokenizer to split text into tokens, to remove tokens starting with "http://" etc., and to concatenate tokens into text again.
If you want to filter Emails from text (because later on you will do NLP staff etc) - just remove...
Clone private git repo with dockerfile
...bles, and have a shell script update your docker file at runtime. You keep tokens out of your Dockerfiles and you can clone over https (no need to generate or pass around ssh keys).
Go to Settings > Personal Access Tokens
Generate a personal access token with repo scope enabled.
Clone like thi...
Is there any overhead to declaring a variable within a loop? (C++)
...
Stack space for local variables is usually allocated in function scope. So no stack pointer adjustment happens inside the loop, just assigning 4 to var. Therefore these two snippets have the same overhead.
...
Configuring user and password with Git Bash
...
For those who are using access token and a Windows environment, there is a simple way to do it:
Start menu → Credential Manager → Windows Credentials → find the line (Git: https://whatever/your-repository/url) → edit,
user name is "PersonalAccessTo...
App Inventor 2 如何接入ChatGPT：国内访问OpenAI的最佳方式 · App Inventor 2 中文网
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如何接入OpenAI
通过token（访问令牌）接入
通过ApiKey接入
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如何接入OpenAI
由于国内无法访问OpenAI，KX上网可选大陆及香港（被屏蔽）以外才行。因此对于大多数人来说，想体验...
Difference between java.util.Random and java.security.SecureRandom
...team got handed over some server side code (in Java) that generates random tokens and I have a question regarding the same -
...
Most efficient way to remove special characters from string
... @SILENT: No, it doesn't, but you should only do that once. If you allocate an array that large each time you call the method (and if you call the method frequently) then the method becomes the slowest by far, and causes a lot of work for the garbage collector.
– Guffa
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How to make sure that string is valid JSON using JSON.NET
...method).
(Using JSON.Net)
Simplest way would be to Parse the string using JToken.Parse, and also to check if the string starts with { or [ and ends with } or ] respectively (added from this answer):
private static bool IsValidJson(string strInput)
{
if (string.IsNullOrWhiteSpace(strInput)) { ret...