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Python: Using .format() on a Unicode-escaped string
...'\u2265'
>>> print s
works because print automatically uses the system encoding for your environment, which was likely set to UTF-8. (You can check by doing import sys; print sys.stdout.encoding)
>>> print "{0}".format(s)
fails because format tries to match the encoding of the ...
Difference between a user and a schema in Oracle?
...des the EMP, DEPT and BONUS tables with various grants, and
other stuff.
SYS is a schema that includes tons of tables, views, grants, etc etc etc.
SYSTEM is a schema.....
Technically -- A schema is the set of metadata (data dictionary) used by the database,
typically generated using DDL. A sche...
PHP - Get bool to echo false when false
...'ve been programming for 20+ years and never have I wanted 'false' to auto-convert to blank.. null many times, but never 'false'. My Java/Spring/Hibernate development is so so so much cleaner & stronger than even modest PHP systems. I could find plenty of people who were confused.. stackoverflow...
What is the purpose of a question mark after a type (for example: int? myVariable)?
... allowed. return value ? value : "isNull"; tells me that string value isnt convertable into bool.
– C4d
Sep 7 '15 at 13:20
...
总结const_cast、static_cast、dynamic_cast、reinterpret_cast - C/C++ - ...
...t z;
};情况1：两个无关的类之间的转换
// Convert between CBaseX* and CBaseY*
// CBaseX* 和 CBaseY*之间的转换
CBaseX* pX = new CBaseX();
// Error, types pointed to are unrelated
// 错误， 类型指向是无关的
// CBaseY*...
How come an array's address is equal to its value in C?
...er than the first (because it's an array of 16 char's). Since %p typically converts pointers in hexadecimal, it might look something like:
0x12341000 0x12341010
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Can I list-initialize a vector of move-only type?
...ove_only()) };
Since the standard, for whatever reason, doesn't define a converting copy constructor like this:
// in class initializer_list
template<class U>
initializer_list(initializer_list<U> const& other);
The initializer_list<rref_wrapper<move_only>> created by...
Reloading module giving NameError: name 'reload' is not defined
...as below. Use this in the top of the module (assumes python 3.4+).
import sys
if(sys.version_info.major>=3):
def reload(MODULE):
import importlib
importlib.reload(MODULE)
BTW reload is very much required if you use python files as config files and want to avoid rest...
Determining Whether a Directory is Writeable
...ould I want to, e.g. try to write something into every directory in my filesystem, to produce a list of writable locations?
– Tomasz Gandor
Apr 5 '16 at 8:20
4
...
Check if string matches pattern
...
import re
import sys
prog = re.compile('([A-Z]\d+)+')
while True:
line = sys.stdin.readline()
if not line: break
if prog.match(line):
print 'matched'
else:
print 'not matched'
...