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In MySQL, can I copy one row to insert into the same table?
...T, out newid INT)
BEGIN
DECLARE EXIT HANDLER FOR SQLEXCEPTION SET @error=1;
SET @temptable = '_duplicate_temp_table';
SET @sql_text = CONCAT('CREATE TABLE ', @temptable, ' LIKE ', copytable);
PREPARE stmt FROM @sql_text;
EXECUTE stmt;
DEALLOCATE PREPAR...
Quick Way to Implement Dictionary in C
...ion, it's hard to beat naively searching through an array. Aside from some error checking, this is a complete implementation (untested).
typedef struct dict_entry_s {
const char *key;
int value;
} dict_entry_s;
typedef struct dict_s {
int len;
int cap;
dict_entry_s *entry;
} di...
How do I set a column value to NULL in SQL Server Management Studio?
...n is a numeric datatype (int and the like) it will pop up an Invalid Value error. And so on. NULL is the absence of a value, and is does not mean "blank."
– undrline
Apr 8 '19 at 16:49
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How do I parallelize a simple Python loop?
...erhead) or capturing of the traceback of the child process, to have better error reporting.
Disclaimer: I am the original author of joblib.
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In Maven 2, how do I know from which dependency comes a transitive dependency?
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This didn't work for me; all I got was errors about unsupported 'legacy' values. Running @David Crow's version (i.e. without the velocity flag) worked fine though.
– Vlad Schnakovszki
Feb 28 '17 at 13:51
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Squash the first two commits in Git? [duplicate]
... This doesn't work for me. When I then go on with git push, I get an error message saying that I need to git pull first. If I do that and then push, I end up repeating several of the commits instead of reducing the number of commits.
– Matt Huggins
Feb 2...
How to check iOS version?
...o includes a method for performing version comparisons with less chance of error:
- (BOOL)isOperatingSystemAtLeastVersion:(NSOperatingSystemVersion)version
Projects targeting older systems can use systemVersion on UIDevice. Apple uses it in their GLSprite sample code.
// A system version of 3.1 ...
Why is there no String.Empty in Java?
...ength and List.length(). I would argue that is more confusing and prone to error. As for .append() and .push(), while they do perform similar tasks I think they appropriately named. Appending the String is exactly what you're doing, but you don't "append" a Stack, you push and pop values. And String...
Recursive lambda functions in C++11
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Hm, when trying, GCC 8.1 (linux) complained: error: use of ‘[...]’ before deduction of ‘auto’ – needed to explicitly specify return type (on the other hand, didn't need mutable).
– Aconcagua
Mar 23 '19 at 15:40
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Rails extending ActiveRecord::Base
... I like this idea because is a standard way of doing it but... I get an error Table 'moboolo_development.abstract_models' doesn't exist: SHOW FIELDS FROM abstract_models. Where should I put it?
– xpepermint
Feb 25 '10 at 7:59
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