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In Clojure how can I convert a String to a number?

I have various strings, some like "45", some like "45px". How how I convert both of these to the number 45? 12 Answers ...
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What is the difference between DSA and RSA?

It appears they are both encryption algorithms that require public and private keys. Why would I pick one versus the other to provide encryption in my client server application? ...
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What is the difference between LR, SLR, and LALR parsers?

What is the actual difference between LR, SLR, and LALR parsers? I know that SLR and LALR are types of LR parsers, but what is the actual difference as far as their parsing tables are concerned? ...
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What format string do I use for milliseconds in date strings on iPhone?

I'm required to parse strings in a format that includes milliseconds. What format string do I use to get the right date value? ...
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Parse XML using JavaScript [duplicate]

I need to be able to parse XML using JavaScript. The XML will be in a variable. I would prefer not to use jQuery or other frameworks. ...
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What is the pythonic way to detect the last element in a 'for' loop?

I'd like to know the best way (more compact and "pythonic" way) to do a special treatment for the last element in a for loop. There is a piece of code that should be called only between elements, being suppressed in the last one. ...
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Duplicate log output when using Python logging module

I am using python logger. The following is my code: 14 Answers 14 ...
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How can two strings be concatenated?

How can I concatenate (merge, combine) two values? For example I have: 12 Answers 12 ...
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Getting MAC Address

I need a cross platform method of determining the MAC address of a computer at run time. For windows the 'wmi' module can be used and the only method under Linux I could find was to run ifconfig and run a regex across its output. I don't like using a package that only works on one OS, and parsing ...
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Convert timestamp to readable date/time PHP

I have a timestamp stored in a session (1299446702). 13 Answers 13 ...