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Storing Data in MySQL as JSON

...REPLACE(column, '{', ''), '}', ','), '"', ''), LOCATE( CONCAT('myfield', ':'), REPLACE(REPLACE(REPLACE(column, '{', ''), '}', ','), '"', '') ) + CHAR_LENGTH(CONCAT('myfield', ':')), LOCATE( ',', SUBSTRING( REPLAC...
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Conveniently Declaring Compile-Time Strings in C++

... Can operations that create new constexpr strings (like string concatenation and substring extraction) work with this approach? Perhaps using two constexpr-string classes (one based on str_const and the other based on sequence), this may be possible. The user would use str_const to initi...
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How to convert an entire MySQL database characterset and collation to UTF-8?

... You can create the sql to update all tables with: SELECT CONCAT("ALTER TABLE ",TABLE_SCHEMA,".",TABLE_NAME," CHARACTER SET utf8 COLLATE utf8_general_ci; ", "ALTER TABLE ",TABLE_SCHEMA,".",TABLE_NAME," CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci; ") AS alter_sq...
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Permutations in JavaScript?

... arr.splice(i, 1); if (arr.length === 0) { results.push(memo.concat(cur)); } permute(arr.slice(), memo.concat(cur)); arr.splice(i, 0, cur[0]); } return results; } return permute(inputArr); } Adding an ES6 (2015) version. Also does not mutate the origin...
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.NET / C# - Convert char[] to string

... 'o', 'c', 'k', '-', '&', '-', 'R', 'o', 'l', 'l' }; string s = String.Concat( c ); Debug.Assert( s.Equals( "Rock-&-Roll" ) ); share | improve this answer | follow ...
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How do you create a random string that's suitable for a session ID in PostgreSQL?

...ng is always 32 characters. If you wanted a string of length 64, you could concatenate 2 MD5 strings: SELECT concat(md5(random()::text), md5(random()::text)); And if you wanted somewhere in the middle (50 chars for example), you could take a substring of that: SELECT substr(concat(md5(...
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Search text in fields in every table of a MySQL database

...UN ON YOUR PRODUCTION SERVER # ** USE AN ALTERNATE BACKUP ** SELECT CONCAT('SELECT * FROM ', A.TABLE_SCHEMA, '.', A.TABLE_NAME, ' WHERE ', A.COLUMN_NAME, ' LIKE \'%stuff%\';') FROM INFORMATION_SCHEMA.COLUMNS A WHERE A.TABLE_SCHEMA != 'mysql' AND A.TABLE_SCHEMA !...
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String concatenation vs. string substitution in Python

In Python, the where and when of using string concatenation versus string substitution eludes me. As the string concatenation has seen large boosts in performance, is this (becoming more) a stylistic decision rather than a practical one? ...
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Create an array with same element repeated multiple times

...== 0) return []; var a = [value]; while (a.length * 2 <= len) a = a.concat(a); if (a.length < len) a = a.concat(a.slice(0, len - a.length)); return a; } It doubles the array in each iteration, so it can create a really large array with few iterations. Note: You can also improve yo...
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Iterate two Lists or Arrays with one ForEach statement in C#

... You can use Union or Concat, the former removes duplicates, the later doesn't foreach (var item in List1.Union(List1)) { //TODO: Real code goes here } foreach (var item in List1.Concat(List1)) { //TODO: Real code goes here } ...