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C++ map access discards qualifiers (const)
...k up a key without modifying the map.
find() returns an iterator, or const_iterator to an std::pair containing both the key (.first) and the value (.second).
In C++11, you could also use at() for std::map. If element doesn't exist the function throws a std::out_of_range exception, in contrast to o...
SQLAlchemy: cascade delete
... This is well explained in the current doc docs.sqlalchemy.org/en/rel_0_9/orm/cascades.html
– Epoc
Feb 28 '15 at 19:47
1
...
What are the most common naming conventions in C?
...which can be summarized as follows:
All macros and constants in caps: MAX_BUFFER_SIZE, TRACKING_ID_PREFIX.
Struct names and typedef's in camelcase: GtkWidget, TrackingOrder.
Functions that operate on structs: classic C style: gtk_widget_show(), tracking_order_process().
Pointers: nothing fancy her...
How to smooth a curve in the right way?
... how easy it is to use. Note: I left out the code for defining the savitzky_golay() function because you can literally copy/paste it from the cookbook example I linked above.
import numpy as np
import matplotlib.pyplot as plt
x = np.linspace(0,2*np.pi,100)
y = np.sin(x) + np.random.random(100) * 0...
Why can I access TypeScript private members when I shouldn't be able to?
...
Doesn't typescript do this ALL the time by setting var _this for use in scoped functions? Why would you have qualms doing it at the class scope?
– DrSammyD
Mar 24 '16 at 17:22
...
How to inspect the return value of a function in GDB?
...4-yellowdog-linux-gnu"...
(no debugging symbols found)
Using host libthread_db library "/lib64/libthread_db.so.1".
(gdb) break __libc_start_main
Breakpoint 1 at 0x10013cb0
(gdb) r
Starting program: /bin/ls
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no de...
Javascript - How to detect if document has loaded (IE 7/Firefox 3)
...ame thing twice
arguments.callee.done = true;
// kill the timer
if (_timer) clearInterval(_timer);
// do stuff
};
/* for Mozilla/Opera9 */
if (document.addEventListener) {
document.addEventListener("DOMContentLoaded", init, false);
}
/* for Internet Explorer */
/*@cc_on @*/
/*@if (@_wi...
What's the easiest way to escape HTML in Python?
...fe. In other words, this is not safe: <a href=" {{ html.escape(untrusted_text) }} ">
– pianoJames
Jul 30 '19 at 15:49
...
What is the difference between “text” and new String(“text”)?
... a reference to an instance of class String, and is derived from a CONSTANT_String_info structure (§4.4.3) in the binary representation of a class or interface. The CONSTANT_String_info structure gives the sequence of Unicode code points constituting the string literal.
The Java programming la...
pandas dataframe columns scaling with sklearn
...ndas dataframe with mixed type columns, and I'd like to apply sklearn's min_max_scaler to some of the columns. Ideally, I'd like to do these transformations in place, but haven't figured out a way to do that yet. I've written the following code that works:
...