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Verify a certificate chain using openssl verify

... From verify documentation: If a certificate is found which is its own issuer it is assumed to be the root CA. In other words, root CA needs to self signed for verify to work. This is why your second command didn't work. Try this instea...
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Programmatically get height of navigation bar

...know that the presence of the more view controller (navigation bar) pushes down the UIView by its height. I also know that this height = 44px. I have also discovered that this push down maintains the [self.view].frame.origin.y = 0 . ...
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Why are there no ++ and --​ operators in Python?

... It's not because it doesn't make sense; it makes perfect sense to define "x++" as "x += 1, evaluating to the previous binding of x". If you want to know the original reason, you'll have to either wade through old Python mailing lists or ask som...
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What is the proper way to use the node.js postgresql module?

... I'm the author of node-postgres. First, I apologize the documentation has failed to make the right option clear: that's my fault. I'll try to improve it. I wrote a Gist just now to explain this because the conversation grew too long for Twitter. Using pg.connect is the way to...
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What exactly are DLL files, and how do they work?

How exactly do DLL files work? There seems to be an awful lot of them, but I don't know what they are or how they work. 9 A...
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How did Google manage to do this? Slide ActionBar in Android application

I really want to implement this (the side navigation) in an app of my own, does anyone know how Google managed to do this? ...
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How do I import .sql files into SQLite 3?

... answered Jan 12 '10 at 13:14 Dominic RodgerDominic Rodger 87.2k2828 gold badges185185 silver badges205205 bronze badges ...
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Why is @autoreleasepool still needed with ARC?

For the most part with ARC (Automatic Reference Counting), we don't need to think about memory management at all with Objective-C objects. It is not permitted to create NSAutoreleasePool s anymore, however there is a new syntax: ...
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What are the respective advantages/limitations of Amazon RDS vs. EC2 with MySQL? [closed]

...In short: EC2 will provide maximum performance if you go with a RAID0 EBS. Doing RAID0 EBS requires a pretty significant amount of maintenance overhead, for example: http://alestic.com/2009/06/ec2-ebs-raid http://alestic.com/2009/09/ec2-consistent-snapshot EC2 without RAID0 EBS will provide crapp...
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What does placing a @ in front of a C# variable name do? [duplicate]

...e and I've been seeing a lot of @ symbols in front of variable names. What does this signify or do? 6 Answers ...