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MySQL InnoDB not releasing disk space after deleting data rows from table
... recreate your table and regain diskspace
Create TBL_B like TBL_A . Insert select data you want to keep from TBL_A into TBL_B. Drop TBL_A, and rename TBL_B to TBL_A. This way is very effective if TBL_A and data that needed to delete is big (delete command in MySQL innodb is very bad performance)
...
Parse large JSON file in Nodejs
...s answer with JSONStream + event-stream. I modified the JSONPath query to select only what I needed. This time the memory never went higher than 82MB, however, the whole thing now took 70 seconds to complete!
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How does the Google “Did you mean?” Algorithm work?
...ults than using n-gram indexing, as described above.
In each case you must select the best correction from a list. This may be a distance metric such as levenshtein, the keyboard metric, etc.
For a multi-word phrase, only one word may be misspelled, in which case you can use the remaining words as c...
How to check if the user can go back in browser history or not
... if the 'beforeunload' fired.
var $window = $(window),
$trigger = $('.select_your_link'),
fallback = 'your_fallback_url';
hasHistory = false;
$window.on('beforeunload', function(){
hasHistory = true;
});
$trigger.on('click', function(){
window.history.go(-1);
setTimeout(...
Eager load polymorphic
...edTable error ( tested in Rails 3, not 4 ) because the association will do SELECT FROM shops WHERE shop.id = 1 AND ( reviews.review_type = 'Shop' ).
The :include option will force a JOIN instead. :)
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How can I trigger an onchange event manually? [duplicate]
...mir Worked for me (at least in Chrome 36) the following way: document.querySelector('select.freight').dispatchEvent(new Event('change', { 'bubbles': true }))
– SlimShaggy
Aug 6 '14 at 15:10
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Passing arguments to C# generic new() of templated type
...itialize object array argument.
var constructorParameters = parameters.Select((paramType, index) =>
// convert the object[index] to the right constructor parameter type.
Expression.Convert(
// read a value from the object[index]
Expression.ArrayAccess(
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String literals and escape characters in postgresql
...the escape string syntax for escapes, e.g., E'\r\n'.
INSERT 0 1
milen=> select * from EscapeTest;
text
------------------------
This will be inserted
This will not be
(1 row)
milen=>
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What do the f and t commands do in Vim?
...h occurrence of a given letter 100% correct. With v you can see the visual selection, a nice visual cue.
– Bentley4
Nov 27 '13 at 19:00
2
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How to get the source directory of a Bash script from within the script itself?
...e you locate this at start of the script.
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