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What is the use of join() in Python threading?
...example, say we have this:
def non_daemon():
time.sleep(5)
print 'Test non-daemon'
t = threading.Thread(name='non-daemon', target=non_daemon)
t.start()
Which finishes with:
print 'Test one'
t.join()
print 'Test two'
This will output:
Test one
Test non-daemon
Test two
Here the mast...
Generate a Hash from string in Javascript
...
I did a few tests on jsperf (jsperf.com/hashing-strings) and the bitwise function is actually more slow than the number based function.
– skerit
Jun 29 '12 at 21:23
...
How to generate gcc debug symbol outside the build target?
...
Yes, I've tried it: gcc -ggdb -o test test.c; cp test test.debug; strip --only-keep-debug test.debug; strip test; objcopy --add-gnu-debuglink=test.debug test; Then it's ok to debug test
– zhaorufei
Oct 15 '10 at 23:58
...
SQL injection that gets around mysql_real_escape_string()
...mysql_real_escape_string("\xbf\x27 OR 1=1 /*");
mysql_query("SELECT * FROM test WHERE name = '$var' LIMIT 1");
In certain circumstances, that will return more than 1 row. Let's dissect what's going on here:
Selecting a Character Set
mysql_query('SET NAMES gbk');
For this attack to work, we need t...
The tilde operator in Python
...
This is minor usage is tilde...
def split_train_test_by_id(data, test_ratio, id_column):
ids = data[id_column]
in_test_set = ids.apply(lambda id_: test_set_check(id_, test_ratio))
return data.loc[~in_test_set], data.loc[in_test_set]
the code above is from "H...
static constructors in C++? I need to initialize private static objects
...
Test::StaticTest() is called exactly once during global static initialization.
Caller only has to add one line to the function that is to be their static constructor.
static_constructor<&Test::StaticTest>::c; forc...
Get generic type of java.util.List
...in class, then you can get them with a little help of reflection:
package test;
import java.lang.reflect.Field;
import java.lang.reflect.ParameterizedType;
import java.util.ArrayList;
import java.util.List;
public class Test {
List<String> stringList = new ArrayList<String>();
...
Importing modules from parent folder
....py
I call the . the root folder, and in my case it is located in C:\tmp\test_imports.
Steps
1) Add a setup.py to the root folder
The contents of the setup.py can be simply
from setuptools import setup, find_packages
setup(name='myproject', version='1.0', packages=find_packages())
Basically...
Python argparse: default value or specified value
...nargs='?', const=1, type=int)
args = parser.parse_args()
print(args)
% test.py
Namespace(example=None)
% test.py --example
Namespace(example=1)
% test.py --example 2
Namespace(example=2)
nargs='?' means 0-or-1 arguments
const=1 sets the default when there are 0 arguments
type=int converts ...
Find out if string ends with another string in C++
...
} else {
return false;
}
}
int main () {
std::string test1 = "binary";
std::string test2 = "unary";
std::string test3 = "tertiary";
std::string test4 = "ry";
std::string ending = "nary";
std::cout << hasEnding (test1, ending) << std::endl;
s...