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Update Git branches from master

...his approach. When I run git log --graph, the graph show the master is actually merged to the topic branch. Will this cause any problem in the long run? I thought the best practice is always merge the topic branch back to master. Please comment. – Patrick Nov 1...
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You have already activated X, but your Gemfile requires Y

... Using bundle exec is the right way to do this. Basically what's happening is that you've updated rake to 0.9.2 which now conflicts with the version specified in your Gemfile. Previously the latest version of rake you had matched the version in your Gemfile, so you didn't get a...
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Javascript array search and remove string?

... I'm actually updating this thread with a more recent 1-line solution: let arr = ['A', 'B', 'C']; arr = arr.filter(e => e !== 'B'); // will return ['A', 'C'] The idea is basically to filter the array by selecting all elements d...
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Install dependencies globally and locally using package.json

Using npm we can install the modules globally using -g option. How can we do this in the package.json file? 6 Answers ...
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EC2 Instance Cloning

Is it possible to clone a EC2 instance data and all? 7 Answers 7 ...
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Why is lock(this) {…} bad?

... It is bad form to use this in lock statements because it is generally out of your control who else might be locking on that object. In order to properly plan parallel operations, special care should be taken to consider possible deadlock situations, and having an unknown number of lock en...
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Matching a space in regex

...X is the physical tab character (and each is preceded by a single space in all those examples). These will work in every* regex engine I've ever seen (some of which don't even have the one-or-more "+" character, ugh). If you know you'll be using one of the more modern regex engines, "\s" and its v...
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What exactly do the Vagrant commands do?

...produces the information that you may need. vagrant gem is used to install Vagrant plugins via the RubyGems system. In fact, vagrant gem is just a frontend to the actual gem interface, with the difference being that Vagrant sets up a custom directory where gems are installed so that they a...
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Archives not showing up in Organizer for Xcode 4

... EDIT (Incorporated all comments to a single answer) Try one of the following (or all) Instead of using Build For -> Archive, in the product menu just use archive. It will show up then. In the scheme editor, edit the scheme and go to the A...
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How much does it cost to develop an iPhone application? [closed]

...Remember also that we were reusing a bunch existing code: I'm going to lowball the value of that code at $35,000 giving a total development cost of $200,000. Anyone who's done serious iPhone development can tell you there's a lot of design work involved with any project. We had two designers workin...