- ar
creates static libraries.
- ldd
lists the shared libraries on which the object binary is dependent.
- nm
lists the symbols defined in the symbol table of an object file.
- objdump
| // avoid resource leaks when exceptions are thrown. | |
| // if an exception occurs after successful memory allocation but | |
| // before the delete statement executes, a memory leak could occur. | |
| // void memory_leak() | |
| //{ | |
| // ClassA * ptr = new ClassA; | |
| // try { | |
| // ... | |
| // } | |
| // catch(...) { |
| // A functor is any object that can be used with () in the manner of a function. | |
| // includes pointers to functions, and class objects for which the () operator (function call operator) is overloaded | |
| #include <iostream> | |
| #include <vector> | |
| #include <algorithm> | |
| using namespace std; |
creates static libraries.
lists the shared libraries on which the object binary is dependent.
lists the symbols defined in the symbol table of an object file.
source /usr/local/bin/virtualenvwrapper.sh
mkvirtualenv env1
ls $WORKON_HOME
lssitepackages
deactive
rmvirtualenv env2
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <script src="http://d3js.org/d3.v2.min.js?2.9.3"></script> | |
| <style> | |
| .link { | |
| stroke: #ccc; | |
| } | |
| .node text { |
| \DeclareMathOperator*{\argmax}{arg\,max} % in your preamble | |
| \DeclareMathOperator*{\argmin}{arg\,min} % in your preamble | |
| \argmax_{...} % in your formula | |
| \argmin_{...} % in your formula |
| # Dirichlet process Gaussian mixture model | |
| import numpy as np | |
| from scipy.special import gammaln | |
| from scipy.linalg import cholesky | |
| from sliceSample import sliceSample | |
| def multinomialDraw(dist): | |
| """Returns a single draw from the given multinomial distribution.""" | |
| return np.random.multinomial(1, dist).argmax() |
| import numpy as np | |
| from sklearn.datasets import fetch_20newsgroups | |
| from sklearn.feature_extraction.text import CountVectorizer | |
| def get_vectors(vocab_size=5000): | |
| newsgroups_train = fetch_20newsgroups(subset='train') | |
| vectorizer = CountVectorizer(max_df=.9, max_features=vocab_size) | |
| vecs = vectorizer.fit_transform(newsgroups_train.data) | |
| vocabulary = vectorizer.vocabulary | |
| terms = np.array(vocabulary.keys()) |
| import spark.SparkContext | |
| import SparkContext._ | |
| /** | |
| * A port of [[http://blog.echen.me/2012/02/09/movie-recommendations-and-more-via-mapreduce-and-scalding/]] | |
| * to Spark. | |
| * Uses movie ratings data from MovieLens 100k dataset found at [[http://www.grouplens.org/node/73]] | |
| */ | |
| object MovieSimilarities { |
| ; map | |
| (map clojure.string/lower-case ["Java" "Imperative" "Weeping" "Clojure"]) | |
| (map * [1 2 3 4] [5 6 7 8]) | |
| ; reduce | |
| (reduce max [0 -3 10 48]) | |
| (reduce + 50 [1 2 3 4]) | |
| ; partial | |
| (def only-strings (partial filter string?)) |