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Warning :-Presenting view controllers on detached view controllers is discouraged
...ically), i didn't add [self addChildViewController:sampleViewController];, now i added this, thank you
– anjnkmr
Dec 1 '17 at 6:36
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Is #pragma once a safe include guard?
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@AHelps Vaporware. Has it been almost five years now. Maybe in 2023 you'll come back to this comment and say "I told you so".
– doug65536
Dec 10 '16 at 10:28
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JavaScript for…in vs for
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Note that the native Array.forEach method is now widely supported.
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MySQL with Node.js
... implemented. The syntax just looks similar. Instead, it appears that, for now, special characters are being escaped.
– funseiki
Apr 2 '13 at 21:20
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How to open emacs inside bash
...ted at /home/usr/ and at the bottom add the line:
alias enw='emacs -nw'
Now each time you open a terminal session you just type, for example, enw and you have with three letters the emacs no-window option :).
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How do I diff the same file between two different commits on the same branch?
...>...]
For instance, to see the difference for a file "main.c" between now and two commits back, here are three equivalent commands:
$ git diff HEAD^^ HEAD main.c
$ git diff HEAD^^..HEAD -- main.c
$ git diff HEAD~2 HEAD -- main.c
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Single quotes vs. double quotes in Python [closed]
... My opinion has changed on this greatly since I wrote this. It's now just kind of one situation where I would argue that I would use double-quotes. Another would be yours in the context of using single quotes. See the accepted answer for my current stance on the matter in more detail. I th...
How to reshape data from long to wide format
...s this simply, with gather()/spread() being the terms for melt/cast.
Edit: Now, in 2019, tidyr v 1.0 has launched and set spread and gather on a deprecation path, preferring instead pivot_wider and pivot_longer, which you can find described in this answer. Read on if you want a brief glimpse into th...
Why does my 'git branch' have no master?
...e my repo was still empty.) By committing something (any file), the master now came into being, and I was able to go on to doing other things. I tried the things in the other answers, but nothing helped. This one answer here may apply to many people out there. (I read much about hashing in Git. I ...
What is (functional) reactive programming?
...Keep deconstructing into pieces that are more general/simple.
So that you know you're on solid ground, give the whole model a compositional foundation, using the technique of denotational semantics, which just means that (a) each type has a corresponding simple & precise mathematical type of "me...