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Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?
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371
psql's inline help:
\h ALTER TABLE
Also documented in the postgres docs (an excellent resou...
How can I make a JUnit Test wait?
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edited Jul 29 '13 at 2:11
answered Apr 10 '13 at 23:54
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Correctly determine if date string is a valid date in that format
... Originally written by Glavić.]
Test cases:
var_dump(validateDate('2013-13-01')); // false
var_dump(validateDate('20132-13-01')); // false
var_dump(validateDate('2013-11-32')); // false
var_dump(validateDate('2012-2-25')); // false
var_dump(validateDate('2013-12-01')); // true
var_dump(val...
The quest for the Excel custom function tooltip
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3 Answers
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Active
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How to hash a password
...e use the recommendations from the https://stackoverflow.com/a/10402129/251311 instead.
You can either use
var md5 = new MD5CryptoServiceProvider();
var md5data = md5.ComputeHash(data);
or
var sha1 = new SHA1CryptoServiceProvider();
var sha1data = sha1.ComputeHash(data);
To get data as byte a...
Implode an array with JavaScript?
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John
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answered Nov 10 '10 at 17:03
jon_darkstarjon_darkstar
14.8...
How to configure an existing git repo to be shared by a UNIX group
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Trevor Boyd Smith
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answered Jul 13 '10 at 23:34
David UnderhillDav...
Is there an online name demangler for C++? [closed]
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133
I have created such an online serivice: https://demangler.com
This is a gcc c++ symbol demangl...
How to use radio on change event?
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João Pimentel Ferreira
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answered Oct 31 '12 at 7:13
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海量数据相似度计算之simhash和海明距离 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...色外星人 ” ==> 分词后为 “ 美国（4） 51区（5） 雇员（3） 称（1） 内部（2） 有（1） 9架（3） 飞碟（5） 曾（1） 看见（3） 灰色（4） 外星人（5）”，括号里是代表单词在整个句子里重要程度，数字越大越重要。
2、hash，...