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Rails 3 - can't install pg gem

... As stated in your error log you need to pass in the path to the pg_config. Try to install the gem using: gem install pg -- --with-pg-config= 'PATH_TO_YOUR_PG_CONFIG' If you are not sure where your pg_config is, and assuming you are on Linux...
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Finding the average of a list

... And it produces a nicer error if you accidentally pass in an empty list statistics.StatisticsError: mean requires at least one data point instead of a more cryptic ZeroDivisionError: division by zero for the sum(x) / len(x) solution. ...
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What is the tilde (~) in the enum definition?

...the tilde-All, but have to change the all-line with the other. So its less error-prone later. regards share | improve this answer | follow | ...
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How to find if a given key exists in a C++ std::map

...it conversion to prevent the possibility of introducing subtle programming errors. – DavidRR Dec 17 '16 at 15:38 what ...
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Installing PG gem on OS X - failure to build native extension

... Same error for me and I didn't experience it until I downloaded OS X 10.9 (Mavericks). Sigh, another OS upgrade headache. Here's how I fixed it (with homebrew): Install another build of Xcode Tools (typing brew update in the te...
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How can you encode a string to Base64 in JavaScript?

... I try to use this function and I receive the error: Caused by: org.mozilla.javascript.EcmaError: TypeError: Cannot find function replace in object teste teste teste I'm trying to encode .txt with "teste teste teste". Anyone knows why this error? –...
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AngularJS : Initialize service with asynchronous data

...e application may actually work but you will see various unknown providers errors in the console. – IrishDubGuy Jul 25 '15 at 19:06 ...
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Difference between toFixed() and toPrecision()?

...678900000 A.toPrecision() // 123.456789 A.toPrecision(0) // --- ERROR --- A.toPrecision(1) // 1e+2 A.toPrecision(2) // 1.2e+2 A.toPrecision(3) // 123 A.toPrecision(4) // 123.5 A.toPrecision(5) // 123.46 A.toPrecision(6) // 123.457 A.toPrecision(7) // 123.4568 ...
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GIT commit as different user without email / or only email

...e <>", and git commit --amend after, it will fail with invalid ident error; so just don't – sanmai Jun 16 '16 at 8:54 7 ...
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Gson: Directly convert String to JsonObject (no POJO)

... This gives me an error complaining about JsonElement not having a no-arg constructor. – clapas May 28 '15 at 14:19 ad...