大约有 23,000 项符合查询结果（耗时：0.0472秒） [XML]
How do I get the type of a variable?
...signed in C and C++ and they are not caterpillars. (When you create an database application to open variable tables from 'unknown' databases you need to control field type to variable scheme and vice vera in a 'very' dymanic way ;) )
– TomeeNS
Sep 20 '17 at 14:...
filtering NSArray into a new NSArray in Objective-C
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Based on an answer by Clay Bridges, here is an example of filtering using blocks (change yourArray to your array variable name and testFunc to the name of your testing function):
yourArray = [yourArray objectsAtIndexes:[your...
Setting Windows PowerShell environment variables
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+1 :: This one-liner is quite effective for session-based invocations as with mingw ... I.E. $env:PATH += ";c:\MinGW\msys\1.0\bin" ^ {some mingw bin ... }
– Eddie B
Feb 8 '13 at 19:10
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Close iOS Keyboard by touching anywhere using Swift
...reate extension as below & call hideKeyboardWhenTappedAround() in your Base view controller.
//
// UIViewController+Extension.swift
// Project Name
//
// Created by ABC on 2/3/18.
// Copyright © 2018 ABC. All rights reserved.
//
import UIKit
extension UIViewController {
func hideKeyb...
Does PostgreSQL support “accent insensitive” collations?
...ver, it's possible to specify an "accent insensitive" collation (for a database, table or column), which means that it's possible for a query like
...
'Contains()' workaround using Linq to Entities?
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Here's an example where I demonstrate how to write set-based queries using the DataServiceContext :
http://blogs.msdn.com/phaniraj/archive/2008/07/17/set-based-operations-in-ado-net-data-services.aspx
sha...
Among $_REQUEST, $_GET and $_POST which one is the fastest?
...les are in one superglobal). I actually rebuild $_REQUEST before using it based on the other superglobals because of 'variables_order'. I process $_COOKIE, then $_GET, then $_POST. That way POST vars have the highest priority and cookie vars get the lowest, which allows me to implicitly fix a num...
How to write a simple database engine [closed]
I am interested in learning how a database engine works (i.e. the internals of it). I know most of the basic data structures taught in CS (trees, hash tables, lists, etc.) as well as a pretty good understanding of compiler theory (and have implemented a very simple interpreter) but I don't understa...
What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?
... I understand that it has something to do with having to make a lot of database queries for something that seems simple in the object world.
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Vim search and replace selected text
...ng.
" This is useful to copying strings from the file to the search tool
" Based on this - http://peterodding.com/code/vim/profile/autoload/xolox/escape.vim
function! EscapeString (string)
let string=a:string
" Escape regex characters
let string = escape(string, '^$.*\/~[]')
" Escape the lin...