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Convert .pfx to .cer
...onvert a .pfx (Personal Information Exchange) file to a .cer (Security Certificate) file? Unless I'm mistaken, isn't a .cer somehow embedded inside a .pfx? I'd like some way to extract it, if possible.
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How to differ sessions in browser-tabs?
In a web-application implemented in java using JSP and Servlets; if I store information in the user session, this information is shared from all the tabs from the same browser. How to differ sessions in the browser-tabs?
In this example:
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How can I clear or empty a StringBuilder? [duplicate]
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You can leave a little comment if you're afraid future developers won't understand
– krtek
Mar 4 '11 at 10:36
308
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CURL to access a page that requires a login from a different page
I have 2 pages: xyz.com/a and xyz.com/b . I can only access xyz.com/b if and only if I login to xyz.com/a first. If accessing xyz.com/b without going through the other, I simply get access denied (no redirect to login) via the browser. Once I login at xyz.com/a , I can access the other.
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What should I use Android AccountManager for?
...Provider ties into ContentResolver's observer: this means it is easy to notify views when content is changed
Bottom line: the framework AccountManager / SyncAdapter / ContentProvider helps if you want to synchronize data from a web resource. Fake/Dumb implementations are required on API 7. Also
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How to get root view controller?
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if you are trying to access the rootViewController you set in your appDelegate. try this:
Objective-C
YourViewController *rootController = (YourViewController*)[[(YourAppDelegate*)
[[UIApp...
How to make the tab character 4 spaces instead of 8 spaces in nano?
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If you use nano with a language like python (as in your example) it's also a good idea to convert tabs to spaces.
Edit your ~/.nanorc file (or create it) and add:
set tabsize 4
set tabstospaces
If you already got a file w...
jQuery Plugin: Adding Callback functionality
...callback in the plugin:
$.fn.myPlugin = function(options, callback) {
if (typeof callback == 'function') { // make sure the callback is a function
callback.call(this); // brings the scope to the callback
}
};
You can also have the callback in the options object:
$.fn.myPlugin = f...
Thou shalt not inherit from std::vector
Ok, this is really difficult to confess, but I do have a strong temptation at the moment to inherit from std::vector .
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Matching a space in regex
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If you're looking for a space, that would be " " (one space).
If you're looking for one or more, it's " *" (that's two spaces and an asterisk) or " +" (one space and a plus).
If you're looking for common spacing, use "[ X]...