Added the first NLP tutorial

00-intro/sample-code/00-hello.cpp

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+#include <iostream>
+using namespace std;
+
+int main(int argc, char** argv) {
+    cout << "Hello World!" << endl;
+}

00-intro/sample-code/00-hello.py

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+#!/usr/bin/python
+print "Hello World!"
+
+

00-intro/sample-code/01-datatypes.cpp

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+#include <iostream>
+#include <string>
+using namespace std;
+
+int main(int argc, char** argv) {
+    int my_int = 4;
+    double my_float = 2.5;
+    string my_string = "hello";
+
+    cout << "string: " << my_string    // Print the string
+         << "\tfloat: " << my_float    // Print the float
+         << "\tint: " << my_int        // Print the int
+         << endl;                      // Print the end of the line
+}

00-intro/sample-code/01-datatypes.py

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+#!/usr/bin/python
+
+my_int = 4
+my_float = 2.5
+my_string = "hello"
+
+print "string: %s\tfloat: %f\tint: %d" % (my_string, my_float, my_int)
+
+

00-intro/sample-code/02-iffor.cpp

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+#include <iostream>
+#include <string>
+using namespace std;
+
+int main(int argc, char** argv) {
+    int my_variable = 5;
+
+    if(my_variable == 4) {
+        cout << "my_variable is 4" << endl;
+    } else {
+        cout << "my_variable is not 4" << endl;
+    }
+
+    for(int i = 1; i < 5; i++) {
+        cout << "i == " << i << endl;
+    }
+
+}

00-intro/sample-code/02-iffor.py

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+#!/usr/bin/python
+
+my_variable = 5
+
+if my_variable == 4:
+    print "my_variable is 4"
+else:
+    print "my_variable is not 4"
+
+for i in range(1, my_variable):
+    print "i == %d" % (i)

00-intro/sample-code/03-array.cpp

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+#include <iostream>
+#include <vector>
+#include <boost/foreach.hpp>
+using namespace std;
+
+int main(int argc, char** argv) {
+    vector<int> my_list(5);
+    my_list[0] = 1;
+    my_list[1] = 2;
+    my_list[2] = 4;
+    my_list[3] = 8;
+    my_list[4] = 16;
+
+    my_list.push_back(32);
+
+    cout << my_list.size() << endl;
+
+    cout << my_list[3] << endl << endl;
+
+    BOOST_FOREACH(int value, my_list) {
+        cout << value << endl;
+    }
+
+}

00-intro/sample-code/03-array.py

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+#!/usr/bin/python
+
+my_list = [1, 2, 4, 8, 16]
+
+my_list.append(32)
+
+print len(my_list)
+
+print my_list[3]
+print ""
+
+for value in my_list:
+    print value
+
+
+

00-intro/sample-code/04-keyvalue.cpp

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+#include <iostream>
+#include <string>
+#include <boost/tr1/unordered_map.hpp>
+#include <boost/foreach.hpp>
+using namespace std;
+using namespace std::tr1;
+
+int main(int argc, char** argv) {
+    unordered_map<string,int> my_dict;
+    my_dict["alan"] = 22;
+    my_dict["bill"] = 45;
+    my_dict["chris"] = 17;
+    my_dict["dan"] = 27;
+
+    my_dict["eric"] = 33;
+
+    cout << my_dict.size() << endl;
+
+    cout << my_dict["chris"] << endl << endl;
+
+    // Boost foreach can not use pairs directly, so we must define a type
+    // StringIntPair
+    typedef pair<string,int> StringIntPair;
+
+    BOOST_FOREACH(StringIntPair key_value, my_dict) {
+        cout << key_value.first << " --> " << key_value.second << endl;
+    }
+
+}

00-intro/sample-code/04-keyvalue.py

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+#!/usr/bin/python
+
+my_dict = {"alan": 22, "bill": 45, "chris": 17, "dan": 27}
+
+my_dict["eric"] = 33
+
+print len(my_dict)
+print my_dict["chris"]
+
+if "dan" in my_dict:
+    print "dan exists in my_dict"
+
+for foo, bar in sorted(my_dict.items()):
+    print "%s --> %r" % (foo, bar)
+
+
+

00-intro/sample-code/04a-keyvalue.py

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+#!/usr/bin/python
+
+from collections import defaultdict
+
+my_dict = defaultdict(lambda: 0)
+
+my_dict["eric"] = 33
+
+print my_dict["eric"]
+print my_dict["fred"]
+
+for foo, bar in sorted(my_dict.items()):
+    print "%s --> %r" % (foo, bar)
+
+
+

00-intro/sample-code/05-split.cpp

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+#include <iostream>
+#include <string>
+#include <vector>
+#include <boost/algorithm/string.hpp>
+#include <boost/foreach.hpp>
+using namespace std;
+using namespace boost;
+
+int main(int argc, char** argv) {
+
+    string sentence = "this is a pen";
+    vector<string> words;
+    split(words, sentence, is_any_of(" "));
+
+    BOOST_FOREACH(string word, words) {
+        cout << word << endl;
+    }
+
+    cout << boost::algorithm::join(words, " ||| ") << endl;
+
+}

00-intro/sample-code/05-split.py

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+#!/usr/bin/python
+
+import string
+
+sentence = "this is a pen"
+words = sentence.split(" ")
+
+for word in words:
+    print word
+
+print string.join(words, " ||| ")

00-intro/sample-code/06-function.cpp

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+#include <iostream>
+using namespace std;
+
+int add_and_abs(int x, int y) {
+    int z = x + y;
+    if(z >= 0)
+        return z;
+    else
+        return z * -1;
+}
+
+int main(int argc, char** argv) {
+    cout << add_and_abs(-4, 1) << endl;
+}

00-intro/sample-code/06-function.py

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+#!/usr/bin/python
+
+def add_and_abs(x, y):
+    z = x + y
+    if z >= 0:
+        return z
+    else:
+        return z * -1
+
+def test_add_and_abs():
+    if add_and_abs(3, 1) != 4:
+        print "add_and_abs(3, 1) != 4 (== %d)" % add_and_abs(3, 1)
+        return 0
+    if add_and_abs(-4, 1) != 3:
+        print "add_and_abs(-4, 1) != 3 (== %d)" % add_and_abs(-4, 1)
+        return 0
+    return 1
+
+print test_add_and_abs()

00-intro/sample-code/07-readfile.cpp

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+#include <iostream>
+#include <fstream>
+using namespace std;
+
+int main(int argc, char** argv) {
+    ifstream my_file(argv[1]);
+    string line;
+    while(getline(my_file, line)) {
+        if(line.length() != 0) {
+            cout << line << endl;
+        }
+    }
+}

00-intro/sample-code/07-readfile.py

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+#!/usr/bin/python
+
+import sys
+my_file = open(sys.argv[1], "r")
+
+for line in my_file:
+
+    line = line.strip()
+
+    if len(line) != 0:
+        print line