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How to flatten tree via LINQ?
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I disagree: compiled, tested, and working with c. Using e doesn't compile. You can also add if (e == null) return Enumerable.Empty<T>(); to cope with null child lists.
– Adam Houldsworth
Aug 6 '12 at 15...
Determining Whether a Directory is Writeable
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Testing a directory for just the write bit isn't enough if you want to write files to the directory. You will need to test for the execute bit as well if you want to write into the directory. os.access('/path/to/folder', os.W...
RegEx for Javascript to allow only alphanumeric
...If you wanted to return a replaced result, then this would work:
var a = 'Test123*** TEST';
var b = a.replace(/[^a-z0-9]/gi,'');
console.log(b);
This would return:
Test123TEST
Note that the gi is necessary because it means global (not just on the first match), and case-insensitive, which is wh...
How would you implement an LRU cache in Java?
...t more ingrained in my head.
So here is the simplest version with a unit test that shows it works based on some other versions.
First the non-concurrent version:
import java.util.LinkedHashMap;
import java.util.Map;
public class LruSimpleCache<K, V> implements LruCache <K, V>{
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SQL injection that gets around mysql_real_escape_string()
...mysql_real_escape_string("\xbf\x27 OR 1=1 /*");
mysql_query("SELECT * FROM test WHERE name = '$var' LIMIT 1");
In certain circumstances, that will return more than 1 row. Let's dissect what's going on here:
Selecting a Character Set
mysql_query('SET NAMES gbk');
For this attack to work, we need t...
is there a css hack for safari only NOT chrome?
...have issues getting something from here working on your site, DO CHECK THE TEST SITE VIA LINKS BELOW> If a hack is working there, but not on your site, the hack is not the issue - there is something else happening with your site, often just a CSS conflict as mentioned below, or perhaps nothing is...
What's the simplest way to test whether a number is a power of 2 in C++?
...s, so must AND to 0 bitwise.
As I was assuming unsigned numbers, the == 0 test (that I originally forgot, sorry) is adequate. You may want a > 0 test if you're using signed integers.
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How do I use spaces in the Command Prompt?
...y case: python ""C:\Program Files (x86)\Jenkins\workspace\Map Checker Unit Test\sqs-poller\node_modules\map-checker\python\unit_test.py" -d "C:\Program Files (x86)\Jenkins\workspace\Map Checker Unit Test\MAP_CHECK_TMP\#Test Case" -o "C:\Program Files (x86)\Jenkins\workspace\Map Checker Unit Test\MAP...
AsyncProcedures异步过程扩展 · App Inventor 2 中文网
...eight: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } 文档反馈 切换 目录 在线 客服 扫码添加客服咨询 我要 分享 ...
How do I get an object's unqualified (short) class name?
...want to require that the object is a member of a certain class, the way to test it is with instanceof. If you want a more flexible way to signal certain constraints, the way to do that is to write an interface and require that the code implement that interface. Again, the correct way to do this is w...