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Why can lambdas be better optimized by the compiler than plain functions?
...in = f(*begin);
}
Calling it with a lambda like this:
int a[] = { 1, 2, 3, 4 };
map(begin(a), end(a), [](int n) { return n * 2; });
Results in this instantiation (created by the compiler):
template <>
void map<int*, _some_lambda_type>(int* begin, int* end, _some_lambda_type f) {
...
Query for array elements inside JSON type
I'm trying to test out the json type in PostgreSQL 9.3.
I have a json column called data in a table called reports . The JSON looks something like this:
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Java variable number or arguments for a method
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edited Oct 20 '17 at 1:43
ErikE
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Creating Multifield Indexes in Mongoose / MongoDB
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answered Sep 24 '12 at 22:53
JohnnyHKJohnnyHK
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How to add a spinner icon to button when it's in the Loading state?
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edited Apr 3 '16 at 18:33
SHAZ
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an...
Custom attributes in styles.xml
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363
I figured it out! The answer is to NOT specify the namespace in the style.
<?xml version="...
Cordova 3.5.0 Install Error- Please Install Android Target 19
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183
Android SDK is not your target Android version. Target Android version 19 is the API level for a...
Change SQLite default settings
...ome directory of the user running sqlite.
(P.S. I found that in man sqlite3.)
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Adding a Method to an Existing Object Instance
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Cristian Ciupitu
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answered Aug 6 '08 at 0:33
Jason PrattJason Prat...
Convert data.frame columns from factors to characters
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370
Just following on Matt and Dirk. If you want to recreate your existing data frame without cha...