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What does .SD stand for in data.table in R

...al-world feel, rather than making up data, let's load some data sets about baseball from Lahman: library(data.table) library(magrittr) # some piping can be beautiful library(Lahman) Teams = as.data.table(Teams) # *I'm selectively suppressing the printed output of tables here* Teams Pitching = as.d...
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Undefined symbols for architecture i386: _OBJC_CLASS_$_SKPSMTPMessage", referenced from: error

...uild Setting -> Linking -> Other Linker Flags -> Add -lLibraryName_$(PLATFORM_NAME)d for Debug, and add -lLibraryName_$(PLATFORM_NAME) for Release – George Nov 3 '13 at 15:55 ...
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Very simple log4j2 XML configuration file using Console and File appender

...attern no longer applies to the active file --> <TimeBasedTriggeringPolicy interval="1" modulate="true" /> </Policies> </RollingFile> </Appenders> <Loggers> <Root level="DEBUG" additivity="false"> ...
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Parse usable Street Address, City, State, Zip from a string [closed]

Problem: I have an address field from an Access database which has been converted to Sql Server 2005. This field has everything all in one field. I need to parse out the individual sections of the address into their appropriate fields in a normalized table. I need to do this for approximately 4,000 ...
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What is the difference between a mutable and immutable string in C#?

...ring str, [1] class [mscorlib]System.Text.StringBuilder sb) IL_0000: nop IL_0001: ldstr "inital value" IL_0006: stloc.0 IL_0007: ldstr "\nsecond value" IL_000c: stloc.0 IL_000d: ldstr "\nthird value" IL_0012: stloc.0 IL_0013: newobj instance void...
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How can I read SMS messages from the device programmatically in Android?

...(cursor.moveToNext()); } else { // empty box, no SMS } Please add READ_SMS permission. I Hope it helps :) share | improve this answer | follow | ...
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Using generic std::function objects with member functions in one class

...int)> f = std::bind(&Foo::doSomethingArgs, this, std::placeholders::_1, std::placeholders::_2); Or, if your compiler supports C++11 lambdas: std::function<void(int,int)> f = [=](int a, int b) { this->doSomethingArgs(a, b); } (I don't have a C++11 capable compiler at hand rig...
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Removing event listener which was added with bind

...e, fn, capture) { this.f = f; this._eventHandlers = this._eventHandlers || {}; this._eventHandlers[type] = this._eventHandlers[type] || []; this._eventHandlers[type].push([fn, capture]); this.f(type, ...
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Servlet for serving static content

...r a folder from the disk, say C:\resources) I modified the this row: this.basePath = getServletContext().getRealPath(getInitParameter("basePath")); And replaced it with: this.basePath = getInitParameter("basePath"); – Yossi Shasho Aug 15 '12 at 7:39 ...
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Call a python function from jinja2

... For those using Flask, put this in your __init__.py: def clever_function(): return u'HELLO' app.jinja_env.globals.update(clever_function=clever_function) and in your template call it with {{ clever_function() }} ...