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Create unique constraint with null columns
...add a menu link - otherwise I create the FavoriteWithoutMenu row first and then link it to a menu if necessary. It also makes selecting all the favorites in one query very difficult: I'd have to do something weird like select all the menu links first, and then select all the Favorites whose IDs don...
Pointers in C: when to use the ampersand and the asterisk?
...stream) {stream = fopen("myfile.dat", "r"); }
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FILE *in;
myFopen(in);
then we're modifying the value of the input parameter stream, not what stream points to, so changing stream has no effect on the value of in; in order for this to work, we must pass in a pointer to the pointer:
int myFopen(F...
Is gcc std::unordered_map implementation slow? If so - why?
...which is gcc 4.7.1 on debian testing).
I will submit a bug report.. until then: DO NOT use std::unordered_map with gcc 4.7!
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How to avoid isset() and empty()
... only its value should be of consequence. If the key is a true/false flag, then use true or false, not null. The only exception to this would be 3rd party libraries that want null to mean something, but since null is so hard to detect in PHP I have yet to find any library that does this.
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What's the difference between unit, functional, acceptance, and integration tests? [closed]
...tests are test that are made after clients starts to use your service, you then write tests that checks if you don't broke something for that particular clients, i.e. change service api.
– Rafał Łużyński
Dec 29 '15 at 0:46
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How to get the input from the Tkinter Text Widget?
...ttributes to the normal .get() function. If we have a text box myText_Box, then this is the method for retrieving its input.
def retrieve_input():
input = self.myText_Box.get("1.0",END)
The first part, "1.0" means that the input should be read from line one, character zero (ie: the very first...
How do popular apps authenticate user requests from their mobile app to their server?
...on that I have is regarding how to sign-up/login the user first time and authenticate it every time they make a request to the API.
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Node.js and CPU intensive requests
...to keep track of the thousands of open sockets. The OS notifies libev, and then libev notifies NodeJS when one of the sockets gets data, and then NodeJS puts an event on the event queue, and your http code kicks in at this point and handles the events one after the other. Events don't get put on the...
How to add a custom right-click menu to a webpage?
...conditional logic which checks, if key is pressed while right clicking and then NOT calling e.preventDefault() - you will get regular browser menu then.
– Radek Benkel
Nov 28 '14 at 9:14
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What does Docker add to lxc-tools (the userspace LXC tools)?
...ultiple entities want to maintain consistency and have a same base layers, then only the new layers need to be given to these entities to reach the same state.
– div
Sep 13 '16 at 7:41
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