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Reading a huge .csv file
...f_list.append(df_chunk)
# Merge all dataframes into one dataframe
X = pd.concat(df_list)
# Delete the dataframe list to release memory
del df_list
del df_chunk
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How to bind function arguments without binding this?
...is,
partial = function() {
return fn.apply(this, args.concat(slice.call(arguments)));
// ^^^^
};
partial.prototype = Object.create(this.prototype);
return partial;
};
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How to concatenate strings of a string field in a PostgreSQL 'group by' query?
I am looking for a way to concatenate the strings of a field within a group by query. So for example, I have a table:
14 An...
XPath to find elements that does not have an id or class
...ss, 'b'))]
Or if you want to be sure not to match partial.
//*[contains(concat(' ', normalize-space(@class), ' '), ' some-class ') and
not(contains(concat(' ', normalize-space(@class), ' '), ' another-class '))]
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SQL Query to concatenate column values from multiple rows in Oracle
Would it be possible to construct SQL to concatenate column values from
multiple rows?
10 Answers
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How to find all tables that have foreign keys that reference particular table.column and have values
... name, which is required in some cases (e.g. drop constraint):
SELECT
CONCAT(table_name, '.', column_name) AS 'foreign key',
CONCAT(referenced_table_name, '.', referenced_column_name) AS 'references',
constraint_name AS 'constraint name'
FROM
information_schema.key_column_usage
WHER...
Drop multiple tables in one shot in mysql
...les to be deleted.
Get table using the below
For sql server - SELECT CONCAT(name,',') Table_Name FROM SYS.tables;
For oralce - SELECT CONCAT(TABLE_NAME,',') FROM SYS.ALL_TABLES;
Copy and paste the table names from the result set and paste it after the DROP command.
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ASP.NET MVC Razor Concatenation
...
I prefer:
<li id="@String.Concat("item_", item.TheItemId)">
The verbosity tells the support developers exactly what is happening, so it's clear and easy to understand.
sh...
The function to show current file's full path in mini buffer
...delete-region (point) (save-excursion (end-of-line) (point)))
(insert (concat file-true-dir file-name))))
And then if I want it in the clipboard, I just kill the line (C-a C-k). But we could easily copy the truename to the clipboard in the above command, just change the last line to be:
(ins...
How to filter multiple values (OR operation) in angularJS
...)){
fObj[key] = obj;
fData = fData.concat($filter('filter')(this.filteredData,fObj));
} else if (angular.isArray(obj)){
if (obj.length > 0){
for (var i=0;i<obj.length;i++){
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