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How can I wait for set of asynchronous callback functions?
...is by accumulating the data in an array and keeping track of when the last one has finished:
Manual Counter
var ajaxCallsRemaining = 10;
var returnedData = [];
for (var i = 0; i < 10; i++) {
doAjax(whatever, function(response) {
// success handler from the ajax call
// sav...
Why Doesn't C# Allow Static Methods to Implement an Interface?
...ke a non-nullable “this” argument (unlike an instance or virtual), but one where the method called would depend on the constructed type of T (unlike a static, which must be determinable at compile time).
but is yet to be convinced of its usefulness.
...
How to get WordPress post featured image URL
...
I think this is the easiest solution and the updated one:
<?php the_post_thumbnail('single-post-thumbnail'); ?>
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How do I quickly rename a MySQL database (change schema name)?
...u username -ppassword -sNe "rename table old_db.$table to new_db.$table"; done
OR
for table in `mysql -u root -ppassword -s -N -e "use old_db;show tables from old_db;"`; do mysql -u root -ppassword -s -N -e "use old_db;rename table old_db.$table to new_db.$table;"; done;
Notes:
There is no ...
mongodb: insert if not exists
...le:
now = datetime.utcnow()
for document in update:
collection.update_one(
{"_id": document["_id"]},
{
"$setOnInsert": {"insertion_date": now},
"$set": {"last_update_date": now},
},
upsert=True,
)
...
How to center icon and text in a android button with width set to “fill parent”
...hat are compatible with strings in Android. If you can find an acceptable one, this is a simple solution, and it has the added bonus that it will scale with text size. For instance, it has an envelope for an email icon and a couple of different phones for a call button.
– GLee...
Why not infer template parameter from constructor?
...genuinely can't believe it was accepted, reached +29, took 6 years for someone to notice the glaring problem, and sat without a single downvote for 7 years. Does no one else think while they read, or...?
– underscore_d
Aug 21 '16 at 19:19
...
Resolving LNK4098: defaultlib 'MSVCRT' conflicts with
...+ Properties, Linker, Command Line. Note how these libraries are not mentioned here. The linker automatically figures out what /M switch was used by the compiler and which .lib should be linked through a #pragma comment directive. Kinda important, you'd get horrible link errors and hard to diagno...
Logical XOR operator in C++?
...t is the first time I encountered a practical need for it, but I don't see one listed in Stroustrup . I intend to write:
1...
How do I compute derivative using Numpy?
...ivatives by hand.
Finite differences require no external tools but are prone to numerical error and, if you're in a multivariate situation, can take a while.
Symbolic differentiation is ideal if your problem is simple enough. Symbolic methods are getting quite robust these days. SymPy is an exce...