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When to use PNG or JPG in iPhone development?

...splay. However, large PNGs may take longer to read from storage than more compressed image formats, and thus be slower to display. JPG's are smaller to store, but lossy (amount depends on compression level), and to display them requires a much more complicated decoding algorithm. But the typical ...
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How do I copy a hash in Ruby?

... Adding a more explicit comment here for those who aren't reading other answers that this is does a shallow copy. – grumpasaurus Nov 17 '12 at 16:00 ...
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How to replace a hash key with another key

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How do I find out what keystore my JVM is using?

...check where your JAVA_HOME is configured, possibly one of these places, Computer--->Advanced --> Environment variables---> JAVA_HOME Your server startup batch files. In your import command -keystore cacerts (give full path to the above JRE here instead of just saying cacerts). ...
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Which Eclipse files belong under version control?

...deleted" in the Run/Launching/Launch Configuration preference panel: It is common to soft-delete a project in order to import it back again - to force a reinitialization of the eclipse metadata. But this option, if checked, will remove your detailed launch parameters!) project-dir/.project project-...
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How to restore the permissions of files and directories within git if they have been modified?

... " quotes around the !git, otherwise it gets substituted with the last git command you ran. Thx to @Mixologic for pointing out that by simply using -R on git diff, the cumbersome sed command is no longer required. share ...
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What is a “feature flag”?

...gs into production/live yet having the feature disabled/toggled until it's completed. We often use what we call a 'dev cookie' to show uncompleted features to just the dev team. This way we can test partially completed work in production (oh yeh! is there better integration?) over multiple releases/...
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AngularJS: Basic example to use authentication in Single Page Application

...ve created a github repo summing up this article basically: https://medium.com/opinionated-angularjs/techniques-for-authentication-in-angularjs-applications-7bbf0346acec ng-login Github repo Plunker I'll try to explain as good as possible, hope I help some of you out there: (1) app.js: Creation ...
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What is a good Hash Function?

... one by Paul Hsieh is the best I've ever used. http://www.azillionmonkeys.com/qed/hash.html If you care about cryptographically secure or anything else more advanced, then YMMV. If you just want a kick ass general purpose hash function for a hash table lookup, then this is what you're looking for...
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jQuery disable/enable submit button

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