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Are there disadvantages to using a generic varchar(255) for all text-based fields?
...e stored in 1 or 2 bytes. However: "When sending a key to the handler for index_read() or records_in_range, we always use a 2-byte length for the VARCHAR to make things simpler." See forge.mysql.com/wiki/MySQL_Internals_MyISAM
– Bill Karwin
Feb 12 '11 at 18:5...
How does the Google “Did you mean?” Algorithm work?
...l of billions of web pages' worth of words stored. There is no easy way to index Levenshtein distance for fast retrieval of near matches without calculating the Levenshtein distance some billions of times for every word queried. Levenshtein distance is therefore not of much use in this situation, a...
Is there a difference between x++ and ++x in java?
...stack (`2`) and set the
// value of the local variable at index `1` (`y`) to this value.
2: iload_1 // Push the value (`2`) of the local variable at index `1` (`y`)
// onto the operand stack
3: iinc 1, 1 // Sign-extend the constant value `1` to an int,...
Does Ruby have a string.startswith(“abc”) built in method?
...8.7 and 1.9.0 - for older versions you may want to use one of the regex or index versions mentioned in other answers.
– Hamish Downer
Sep 7 '11 at 13:25
3
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Get current directory name (without full path) in a Bash script
... # (consider a directory named -e or -n)
printf '%q\n' "${PWD##*/}" # to print to stdout, quoted for use as shell input
# ...useful to make hidden characters readable.
Note that if you're applying this technique in other circumstances (not PWD,...
RegEx to parse or validate Base64 data
...le to use a RegEx to validate, or sanitize Base64 data? That's the simple question, but the factors that drive this question are what make it difficult.
...
Use basic authentication with jQuery and Ajax
...ample u gave but it doesn't work ` $.ajax ({ url: "server.in.local/index.php", beforeSend: function (xhr) { xhr.setRequestHeader(“Authorization”, “Basic ” + encodeBase64 (“username:password”) );}, succes: function(val) { //alert(val); alert("Thanks for your comment!...
SQL Update with row_number()
...he value generally doesn't change once it is set.
Also make sure you have indexes, especially if you have a WHERE clause on the SELECT statement. A filtered index worked great for me as I was filtering based on payment statuses.
My query using PARTITION by
UPDATE UpdateTarget
SET PaidOrder...
Deserialize JSON into C# dynamic object?
...t);
return true;
}
public override bool TryGetIndex(GetIndexBinder binder, object[] indexes, out object result)
{
if (indexes.Length == 1 && indexes[0] != null)
{
if (!_dictionary.TryGetValue(indexes[0].ToString(), ...
Big O of JavaScript arrays
...ired)
Prepending - O(n) via unshift, since it requires reassigning all the indexes
Insertion - Amortized O(1) if the value does not exist. O(n) if you want to shift existing values (Eg, using splice).
Deletion - Amortized O(1) to remove a value, O(n) if you want to reassign indices via splice.
Swapp...