I want a regular expression that prevents symbols and only allows letters and numbers. The regex below works great, but it doesn't allow for spaces between words. ...

... be the cause of these blocks retaining self and keeping it from being dealloced ? The question is, should I always use a weak reference of self in a block ? ...

... Original answer { void *mem = malloc(1024+16); void *ptr = ((char *)mem+16) & ~ 0x0F; memset_16aligned(ptr, 0, 1024); free(mem); } Fixed answer { void *mem = malloc(1024+15); void *ptr = ((uintptr_t)mem+15) & ~ (uintptr_t)0x0...

...gem, Gemfile.lock should be in your repository. It's used as a snapshot of all your required gems and their dependencies. This way bundler doesn't have to recalculate all the gem dependencies each time you deploy, etc. From cowboycoded's comment below: If you are working on a gem, then DO NOT c...

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