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JavaScript style for optional callbacks
I have some functions which occasionally (not always) will receive a callback and run it. Is checking if the callback is defined/function a good style or is there a better way?
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How do you create a remote Git branch?
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First, you create your branch locally:
git checkout -b <branch-name> # Create a new branch and check it out
The remote branch is automatically created when you push it to the remote server. So when you feel ready for it, you can just do:
git push &...
What is the difference between a var and val definition in Scala?
... can, then, go the other direction. If val is that better, why have var at all? Well, some languages did take that route, but there are situations in which mutability improves performance, a lot.
For example, take an immutable Queue. When you either enqueue or dequeue things in it, you get a new Qu...
What is the email subject length limit?
How many characters are allowed to be in the subject line of Internet email?
I had a scan of The RFC for email but could not see specifically how long it was allowed to be.
I have a colleague that wants to programmatically validate for it.
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How to swap the buffers in 2 windows emacs
...fer-move for this. Now if you are working on the buffer on the left side, calling 'buf-move-right' will swap it with the one on the right. I guess this is what you want.
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Python base64 data decode
...\x00\x00D\xc8\x001\x00\x00\x00\x00'
What problem are you having, specifically?
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Fast permutation -> number -> permutation mapping algorithms
... In general, the k'th digit will have base b[k] = k + 2. The highest value allowed for digit k is h[k] = b[k] - 1 = k + 1.
Our rule about the weights w[k] of digits requires that the sum of h[i] * w[i], where i goes from i = 0 to i = k, is equal to 1 * w[k+1]. Stated recurrently, w[k+1] = w[k] + h[...
WinDbg基础资料（日本語） - IT优秀资料 - 清泛网 - 专注C/C++及内核技术
... Commands
参考資料:
http://www.windbg.info/download/doc/pdf/WinDbg_A_to_Z_color_JP.pdf
①PDB設定
.sympath
.sympath SRV*c:\symbols*http://msdl.microsoft.com/download/symbols;c:\Symbols\mydll
環境変数:
_NT_SYMBOL_PATH
SRV*C:\Symbols*http://msdl.microsoft.com/download/symbol...
How to use R's ellipsis feature when writing your own function?
...e.
For use of unevaluated ... argument look at write.csv code where match.call is used.
As you write in comment result in Dirk answer is not a list of lists. Is a list of length 4, which elements are language type. First object is a symbol - list, second is expression 1:10 and so on. That explain wh...
Disable sorting for a particular column in jQuery DataTables
...nType" : "bootstrap",
"oLanguage" : {
"sLengthMenu" : "_MENU_ records per page"
},
// Disable sorting on the first column
"aoColumnDefs" : [ {
'bSortable' : false,
'aTargets' : [ 0 ]
} ]
});
});
EDIT:
You can disable ...