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Understand convertRect:toView:, convertRect:FromView:, convertPoint:toView: and convertPoint:fromVie
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I always find this confusing so I made a playground where you can visually explore what the convert function does. This is done in Swift 3 and Xcode 8.1b:
import UIKit
import PlaygroundSupport
class MyViewController: UIViewController {
override func viewDidLoad() {
super.viewDidL...
LINGO使用指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...集。
例2.3
sets:
product/A B/;
machine/M N/;
week/1..2/;
allowed(product,machine,week):x;
endsets
LINGO生成了三个父集的所有组合共八组作为allowed集的成员。列表如下：
编号 成员
1 (A,M,1)
2 2 (A,M,2...
How do I use itertools.groupby()?
I haven't been able to find an understandable explanation of how to actually use Python's itertools.groupby() function. What I'm trying to do is this:
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.trim() in JavaScript not working in IE
...han.com/archives/faster-trim-javascript
– Daniel Vassallo
Feb 22 '10 at 0:53
92
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Can grep show only words that match search pattern?
... grep across a number of directories it did display the full file path for all matched files, whereas with -h it just displayed the matched words without any specification about which file it is. So, to match the original question, I think it is necessary in certain circumstances.
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Can I use assert on Android devices?
...t.
You can do
import static junit.framework.Assert.*;
now you can use all the functions like assertTrue, assertEquals, assertNull that are provided in the junit framework.
Be careful not to import the Junit4 framework through eclipse, that would be the org.junit package. You have to use the j...
How do I get the information from a meta tag with JavaScript?
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What you really want is 'let' to keep them locally defined ;)
– tommed
Mar 23 '15 at 21:54
26
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Difference between subprocess.Popen and os.system
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@JacobMarble so suppose I am calling a selenium scraping script from another python script, which of these would allow me to complete the scraping script and then and only then execute the next line of code? As in, my scraping should complete before the e...
Delete an element from a dictionary
... use an an already constructed dict without a single item as **kwargs, some_function(**{k:v for k,v in some_dict.items() if k not 'some_key'})
– Cole
Nov 19 '17 at 21:14
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What's valid and what's not in a URI query?
...t are delimited by characters in the "reserved" set. These characters are called "reserved" because they may (or may not) be defined as delimiters by the generic syntax, by each scheme-specific syntax, or by the implementation-specific syntax of a URI's dereferencing algorithm. If data for a URI com...