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How to calculate time elapsed in bash script?

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Why does comparing strings using either '==' or 'is' sometimes produce a different result?

... 'public' . In a conditional expression I have the comparison var1 is var2 which fails, but if I change it to var1 == var2 it returns True . ...
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Convert NSNumber to int in Objective-C

I use [NSNumber numberWithInt:42] or @(42) to convert an int to NSNumber before adding it to an NSDictionary: 5 Answers...
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Single Sign On across multiple domains [closed]

...ssion id is a unique global identifier generated with algorithm from RFC 4122 The master_login.php will only redirect to domains in its whitelist The master and clients can be in different top level domains. Eg. client1.abc.com, client2.xyz.com, login.mydomain.com ...
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$(document).ready shorthand

... 255 The shorthand for $(document).ready(handler) is $(handler) (where handler is a function). See ...
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Recommended website resolution (width and height)? [closed]

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What does FETCH_HEAD in Git mean?

... 225 FETCH_HEAD is a short-lived ref, to keep track of what has just been fetched from the remote r...
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Task vs Thread differences [duplicate]

... answered Nov 17 '12 at 9:03 Jon SkeetJon Skeet 1210k772772 gold badges85588558 silver badges88218821 bronze badges ...
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What does passport.session() middleware do?

... 142 passport.session() acts as a middleware to alter the req object and change the 'user' value that...
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How to view DLL functions?

... answered Dec 14 '10 at 12:03 detunizeddetunized 14.2k22 gold badges4242 silver badges6262 bronze badges ...