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Replacement for “rename” in dplyr
...which does keep it consistent with the rest of the dplyr functions. Personally, I don't think of it as a problem--you get used to new things quickly especially when it means a significant speedup in your data processing.
– vergilcw
Feb 3 '14 at 15:47
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List of lists into numpy array
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this automatically convert a list of list in a 2D array because the length of all included lists are the same. Do you know how not to do that: make an array of list even if all the lists have the same length? Or is it possible to convert a...
Automatically update version number
...ce the revision and build numbers with a coded date/timestamp, which is usually also a good way.
For more info, see the Assembly Linker Documentation in the /v tag.
As for automatically incrementing numbers, use the AssemblyInfo Task:
AssemblyInfo Task
This can be configured to automatically in...
How can I get last characters of a string
...tring method .substr() combined with the .length property.
var id = "ctl03_Tabs1";
var lastFive = id.substr(id.length - 5); // => "Tabs1"
var lastChar = id.substr(id.length - 1); // => "1"
This gets the characters starting at id.length - 5 and, since the second argument for .substr() is omi...
How does the bitwise complement operator (~ tilde) work?
...ng the binary representation of a number, taking its complement (inverting all the bits) and adding one. Two starts as 0000 0010, and by inverting the bits we get 1111 1101. Adding one gets us the result above. The first bit is the sign bit, implying a negative.
So let's take a look at how we get ~2...
How do I search an SQL Server database for a string?
...he first result it finds and nothing else. Is there a way for it to return all instances of the string in the database?
– qroberts
Jan 21 '16 at 19:23
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Is it good style to explicitly return in Ruby?
...d
Was this meant to be a function that returned a value, or not? It's really hard to say what the developer meant, as it both assigns the instance variable, AND returns the value assigned as well.
Suppose much later, another programmer (perhaps not that familiar with how Ruby does returns based ...
Is Java Regex Thread Safe?
...41681.html#A14 : "The Java 2 SDK, Standard Edition itself contains a file called src.zip that contains the source code for the public classes in the java package") so one can take a quick peek oneself.
– David Tonhofer
Nov 18 '13 at 15:40
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MFC 的SetWindowPos 用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...window, the window loses its topmost status and is placed at the bottom of all other windows.
HWND_NOTOPMOST= -2 在所有非"普通层"之上的"普通层"
Places the window above all non-topmost windows (that is, behind all topmost windows). This flag has no effect if the window is already a n...
How to save/restore serializable object to/from file?
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No need to call the close method on a reader within your using block. Dispose() is implicit and will take place even if an exception is raised within the block before the explicit Close(). Very useful block of code.
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