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How to write trycatch in R
...rn value in case of warning
return(NULL)
},
finally={
# NOTE:
# Here goes everything that should be executed at the end,
# regardless of success or error.
# If you want more than one expression to be executed, then you
# need to wr...
Best way to split string into lines
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If it looks ugly, just remove the unnecessary ToCharArray call.
If you want to split by either \n or \r, you've got two options:
Use an array literal – but this will give you empty lines for Windows-style line endings \r\n:
var result = text.Split(new [] { '\r', '\n' });
Use a...
Deserializing a JSON into a JavaScript object
...t rigorous in its JSON encoding,
or if it does not scrupulously validate all of its inputs,
then it could deliver invalid JSON text that could be carrying dangerous script.
The eval function would execute the script, unleashing its malice.
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Android Studio Editor Font Sizing
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They didn't make this very obvious, did they?
All you have to do is click the "Save As" button to create a new profile. You can't change the font because you can't overwrite the default profiles.
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Merge multiple lines (two blocks) in Vim
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You can certainly do all this with a single copy/paste (using block-mode selection), but I'm guessing that's not what you want.
If you want to do this with just Ex commands
:5,8del | let l=split(@") | 1,4s/$/\=remove(l,0)/
will transform
wor...
Is it possible to change the package name of an Android app on Google Play?
I would like to know whether it is technically possible, not whether it is easy or not, to change the actual package name of an Android app that is on Google Play. What I mean by package name is the name that will show up in the URL. Please, can anyone tell me why this is / is not possible?
Thanks!
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What is the optimal Jewish toenail cutting algorithm?
I am working on the software for a machine that will automatically trim toenails, so that users can simply put their feet in it and run it instead of having to manually do it by biting them or using nail clippers.
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How can I add a column that doesn't allow nulls in a Postgresql database?
... postgres doc offline by doing man ALTER_TABLE :)
– allan.simon
Oct 18 '15 at 19:49
@allan.simon I've never used Post...
Reverting single file in SVN to a particular revision
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This probably does not actually do what the question asker wanted. Using this, the working copy is clean and cannot be committed AS IS, and an "svn update" without a version number specified will retrieve the latest, unwanted version.
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How to delete a remote tag?
...r a branch and for a tag. If you want to make sure that you cannot accidentally remove the branch instead of the tag, you can specify full ref which will never delete a branch:
git push origin :refs/tags/tagname
If you also need to delete the local tag, use:
git tag --delete tagname
Background
Pu...