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How do I spool to a CSV formatted file using SQLPLUS?
...n the primary inner subquery, but aliasing all the columns as col1, col2...etc. is required there.
– Amit Naidu
May 8 '18 at 22:33
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What does multicore assembly language look like?
...ng "load the EDX register with the value 5", "increment the EDX" register, etc.
10 Answers
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Extracting bits with a single multiplication
...bits that meet the (n-m) criterion, but also the ones that are at (n-m+1), etc. Let's call their number Q0 (exactly n-m to next bit), Q1 (n-m+1), up to Q(N-1) (n-1). Then we risk carry if
Q0 > 1
Q0 == 1 && Q1 >= 2
Q0 == 0 && Q1 >= 4
Q0 == 1 && Q1 > 1 && Q...
In practice, what are the main uses for the new “yield from” syntax in Python 3.3?
...m
def reader():
"""A generator that fakes a read from a file, socket, etc."""
for i in range(4):
yield '<< %s' % i
def reader_wrapper(g):
# Manually iterate over data produced by reader
for v in g:
yield v
wrap = reader_wrapper(reader())
for i in wrap:
pr...
How to find memory leak in a C++ code/project?
..._ptr will not work with standard containers such as std::vector, std::list etc. See this : stackoverflow.com/questions/111478/…
– Nawaz
Jun 7 '11 at 6:32
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Where to get “UTF-8” string literal in Java?
... a Charsets class with static fields like Charsets.UTF_8, Charsets.UTF_16, etc.
Since Java 7 you should just use java.nio.charset.StandardCharsets instead for comparable constants.
Note that these constants aren't strings, they're actual Charset instances. All standard APIs that take a charset nam...
Converting a string to a date in JavaScript
...parts[1]); JavaScript counts months from 0:
// January - 0, February - 1, etc.
var mydate = new Date(parts[0], parts[1] - 1, parts[2]);
console.log(mydate.toDateString());
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Do I need dependency injection in NodeJS, or how to deal with …?
...ter name)
var db = require('whichever_db_vendor_i_use');
module.exports.fetchConnection() = function() {
//logic to test connection
//do I want to connection pool?
//do I need only one connection throughout the lifecyle of my application?
return db.createConnection(port, host, d...
What integer hash function are good that accepts an integer hash key?
...tegers that are divisible by a common factor (word-aligned memory adresses etc.). Now if your hash table happens to be divisible by the same factor, you end up with only half (or 1/4, 1/8, etc.) buckets used.
– Rafał Dowgird
Mar 20 '09 at 16:56
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Is there a replacement for unistd.h for Windows (Visual C)?
...for getpid() and the exec..() family */
#include <direct.h> /* for _getcwd() and _chdir() */
#define srandom srand
#define random rand
/* Values for the second argument to access.
These may be OR'd together. */
#define R_OK 4 /* Test for read permission. */
#define W_OK 2 ...