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sql “LIKE” equivalent in django query
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contains and icontains mentioned by falsetru make queries like SELECT ... WHERE headline LIKE '%pattern%
Along with them, you might need these ones with similar behavior:
startswith, istartswith, endswith, iendswith
making
SELECT ... WHERE headline LIKE...
Performance - Date.now() vs Date.getTime()
... that case, Date.now() still wins over new Date() or the like, though only by about 20% on my Chrome and by a tiny amount on IE.
See my JSPERF on
timeStamp2.setTime(Date.now()); // set to current;
vs.
timeStamp1 = new Date(); // set to current;
http://jsperf.com/new-date-vs-settime
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jquery disable form submit on enter
...dd the keypress event to the form as well. Also it doesn't work (anymore?) by just binding the event to the form "name" but only to the form id. Therefore I made this more obvious by changing the code example appropriately.
EDIT 3: Changed bind() to on()
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Delete sql rows where IDs do not have a match from another table
...is non-nullable. Also, the third solution (NOT IN) only requires that f.id by non-nullable. Presumably that is a primary key, so it would be.
– ToolmakerSteve
Sep 26 '16 at 7:42
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Effective way to find any file's Encoding
...encoding for me. I've had greater success determining a file's endianness, by analyzing its byte order mark (BOM). If the file does not have a BOM, this cannot determine the file's encoding.
*UPDATED 4/08/2020 to include UTF-32LE detection and return correct encoding for UTF-32BE
/// <summary&g...
SQL Server ':setvar' Error
...his can be done through the user interface in SQL Server Management Studio by going to the "Query" menu, and selecting "SQLCMD mode."
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Passing variables in remote ssh command
...etween single quote and double quote behaviour in the shell predates Linux by decades.
– sarnold
Jan 30 '19 at 3:56
3
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What is the difference between exit() and abort()?
...s the call to exit(). Control can be transferred directly to such a main() by throwing an exception that is caught in main().
struct exit_exception {
int c;
exit_exception(int c):c(c) { }
};
int main() {
try {
// put all code in here
} catch(exit_exception& e) {
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How to initialize HashSet values by construction?
I need to create a Set with initial values.
23 Answers
23
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Override setter with arc
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Expanding on the answer given by @Pascal I'd just like to add that it's definitely the right thing to do and you can check by seeing what the code compiles down to. I wrote a blog post about how to go about checking, but basically that code compiles down ...