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xtree(1796): warning C4800: “int”: 将值强制为布尔值“true”或“false...
xtree(1796): warning C4800: “int”: 将值强制为布尔值“true”或“false”(性能警告) 1>C: Program Files (x86) Microsoft Visual Studio 11.0 VC include xtree(1796): warning C4800: int: 将值强制为布尔值true或f...1>C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\inc...
An algorithm for inflating/deflating (offsetting, buffering) polygons
...ed this jsFiddle that uses JSTS (JavaScript port of JTS). You just need to convert the coordinates you have to JSTS coordinates:
function vectorCoordinates2JTS (polygon) {
var coordinates = [];
for (var i = 0; i < polygon.length; i++) {
coordinates.push(new jsts.geom.Coordinate(polygon[i...
java.sql.SQLException: Incorrect string value: '\xF0\x9F\x91\xBD\xF0\x9F…'
...ny supplementary characters in
utf8 columns and you need not worry about converting characters or
losing data when upgrading utf8 data from older versions of MySQL.
So to support these characters, your MySQL needs to be 5.5+ and you need to use utf8mb4 everywhere. Connection encoding needs to ...
Usage of protocols as array types and function parameters in swift
...
You want to create a generic class, with a type constraint that requires the classes used with it conform to SomeProtocol, like this:
class SomeClass<T: SomeProtocol> {
typealias ElementType = T
var protocols = [ElementType]()
func addElement(element: ElementT...
Turning a Comma Separated string into individual rows
...ions from SQL Server:
Sample table:
CREATE TABLE Testdata
(
SomeID INT,
OtherID INT,
String VARCHAR(MAX)
)
INSERT Testdata SELECT 1, 9, '18,20,22'
INSERT Testdata SELECT 2, 8, '17,19'
INSERT Testdata SELECT 3, 7, '13,19,20'
INSERT Testdata SELECT 4, 6, ''
INSERT Testdata SELECT ...
What is the reason behind cbegin/cend?
I wonder why cbegin and cend were introduced in C++11?
7 Answers
7
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What's the deal with a leading underscore in PHP class methods?
... code abstraction, should be prefixed with an underscore.
public function convert_text()
private function _convert_text()
Other frameworks do the same, like
Cakephp:
does the same:
Member Visibility
Use PHP5’s private and protected keywords for methods and variables. Additionally, non-public m...
How to get Spinner value?
... String that is displayed to the user), but not its value if you mapped an int array onto the spinner for example.
– A. Steenbergen
Feb 5 '15 at 13:58
...
Programmatically saving image to Django ImageField
...
Here is a method that works well and allows you to convert the file to a certain format as well (to avoid "cannot write mode P as JPEG" error):
import urllib2
from django.core.files.base import ContentFile
from PIL import Image
from StringIO import StringIO
def download_im...
Remove the last three characters from a string
...ove the last three characters from the string you can use string.Substring(Int32, Int32) and give it the starting index 0 and end index three less than the string length. It will get the substring before last three characters.
myString = myString.Substring(0, myString.Length-3);
String.Substri...