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How to exit if a command failed?
...ng ( ) makes the command inside them run in a sub-shell and calling a exit from there causes you to exit the sub-shell and not your original shell, hence execution continues in your original shell.
To overcome this use { }
The last two changes are required by bash.
...
How much overhead does SSL impose?
... sessions cause the negotiated cryptographic parameters to be "remembered" from socket to socket. So HTTP keep-alive would be useful for loading a single web page with its referenced content, but after a few seconds, that connection will close. Three minutes later, say, when another page is fetched,...
How do I get a file extension in PHP?
...
People from other scripting languages always think theirs is better because they have a built-in function to do that and not PHP (I am looking at Pythonistas right now :-)).
In fact, it does exist, but few people know it. Meet path...
I forgot the password I entered during postgres installation
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When connecting to postgres from command line, don't forget to add -h localhost as command line parameter. If not, postgres will try to connect using PEER authentication mode.
The below shows a reset of the password, a failed login with PEER authentica...
What exactly is Arel in Rails 3.0?
... but one that doesn't make sense, or that does something totally different from what you think it does. This can never happen with ARel. (This is what the article I link to below means with "closed under composition".)
will objects/queries be "easier" to create?
Yes. For example, as I mentioned ab...
jQuery pitfalls to avoid [closed]
... to local variables is great but don't forget about the power of chaining (from your example): $("#label").method().method2().css("background-color", "red");
– Lance McNearney
Aug 4 '09 at 22:49
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Declaring functions in JavaScript [duplicate]
...eclared a function with a name swearOutLoud. Which would take a swear word from any object or a call and will give you the output. It can do operations on any object using the "this" parameter that is passed to it and the arguments.
However second declaration is declared as an attribute of object c...
How to use regex with find command?
...-regex find expression matches the whole name, including the relative path from the current directory. For find . this always starts with ./, then any directories.
Also, these are emacs regular expressions, which have other escaping rules than the usual egrep regular expressions.
If these are all ...
How to delete a folder with files using Java
...elf. Symlinks are just an example of things you'll miss writing everything from scratch.
– 9ilsdx 9rvj 0lo
Mar 22 '18 at 7:31
2
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The key must be an application-specific resource id
...atic final int TAG_ONLINE_ID = 1 + 2 << 24;
should work. More info from ceph3us:
The specified key should be an id declared in the resources of the
application to ensure it is unique Keys identified as belonging to the
Android framework or not associated with any package will cause a...