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max value of integer
In C, the integer (for 32 bit machine) is 32 bits, and it ranges from -32,768 to +32,767.
In Java, the integer(long) is also 32 bits, but ranges from -2,147,483,648 to +2,147,483,647.
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Get contentEditable caret index position
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function getCaretPosition(editableDiv) {
var caretPos = 0,
sel, range;
if (window.getSelection) {
sel = window.getSelection();
if (sel.rangeCount) {
range = sel.getRangeAt(0);
if (range.commonAncestorContainer.parentNode == editableDiv) {
caretPos = ran...
How to use range-based for() loop with std::map?
The common example for C++11 range-based for() loops is always something simple like this:
5 Answers
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Python - Create a list with initial capacity
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def doAppend( size=10000 ):
result = []
for i in range(size):
message= "some unique object %d" % ( i, )
result.append(message)
return result
def doAllocate( size=10000 ):
result=size*[None]
for i in range(size):
message= "some unique obj...
Is it possible to use 'else' in a list comprehension? [duplicate]
...) if index in ords_to_keep else replace_with
for index in xrange(15))
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What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL?
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They take up different amounts of space and they have different ranges of acceptable values.
Here are the sizes and ranges of values for SQL Server, other RDBMSes have similar documentation:
MySQL
Postgres
Oracle (they just have a NUMBER datatype really)
DB2
Turns out they all use th...
Remove all values within one list from another list? [duplicate]
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>>> a = range(1, 10)
>>> [x for x in a if x not in [2, 3, 7]]
[1, 4, 5, 6, 8, 9]
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List comprehension vs map
...tage of map when using exactly the same function:
$ python -mtimeit -s'xs=range(10)' 'map(hex, xs)'
100000 loops, best of 3: 4.86 usec per loop
$ python -mtimeit -s'xs=range(10)' '[hex(x) for x in xs]'
100000 loops, best of 3: 5.58 usec per loop
An example of how performance comparison gets compl...
Types in MySQL: BigInt(20) vs Int(20)
... It's a hint for display width. It has nothing to do with storage, nor the range of values that column will accept.
Practically, it affects only the ZEROFILL option:
CREATE TABLE foo ( bar INT(20) ZEROFILL );
INSERT INTO foo (bar) VALUES (1234);
SELECT bar from foo;
+----------------------+
| b...
Why (0-6) is -6 = False? [duplicate]
...tialization in a block of integer objects we saw above. The small integers range is from -5 to 256. Many Python programs spend a lot of time using integers in that range so this is a smart decision.
This is only an implementation detail of CPython and you shouldn't rely on this. For instance, PyPy...