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What is the difference between SAX and DOM?
...of his own. What if he creates his own data structure, such as an array of strings to store the SSN and an array of integers to sto re the points ? In this case, I think SAX is a better choice, before this could save both memory and time as well, yet get the job done.
Well, one more consideration o...
How do I migrate a model out of one django app and into a new one?
...opefully for create_kittycat you only need to change the following
# 4 strings to go forward cleanly... backwards will need a bit more work.
old_app = 'common'
old_model = 'cat'
new_app = 'specific'
new_model = 'kittycat'
# You may also wish to update the ContentType.name,
...
What's the difference between utf8_general_ci and utf8_unicode_ci?
...OLLATE ... and Description LIKE 'test%' COLLATE ... only process a single string ("test") at runtime, don't they? 3) In real apps, columns used in ordering would probably be indexed, and indexing speed on different collations with real non-ASCII text might differ.
– Halil Özg...
What is the most effective way for float and double comparison?
... in my code, difference between the original expected value and the parsed string.
– mwpowellhtx
Jan 20 '19 at 17:31
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show 1 more comment
...
What are the effects of exceptions on performance in Java?
... throw new Exception();
}
}
public static void main(String[] args) {
int i;
long l;
Test t = new Test();
l = System.currentTimeMillis();
t.reset();
for (i = 1; i < 100000000; i++) {
t.method1(i);
}
...
REST API Token-based Authentication
...the baseauth password. For improved robustness, I recommend using a random string instead of the timestamp as a "nonce" to prevent replay attacks (two legit requests could be made during the same second). Instead of providing seperate "shared secret" and "api key" fields, you can simply use the api ...
Writing your own STL Container
...
Code is runnable out of the box.
#include <iostream>
#include <string>
#include <vector>
template<typename T>
struct It
{
std::vector<T>& vec_;
int pointer_;
It(std::vector<T>& vec) : vec_{vec}, pointer_{0} {}
It(std::vector<T>&...
Grouping functions (tapply, by, aggregate) and the *apply family
... is best illustrated with a user-defined function to apply:
# Append ! to string, otherwise increment
myFun <- function(x){
if(is.character(x)){
return(paste(x,"!",sep=""))
}
else{
return(x + 1)
}
}
#A nested list structure
l <- list(a = list(a1 = "Boo", b1 = 2, c...
Multi-key dictionary in c#? [duplicate]
... : ValueObject<MyValueObject> {
public DayOfWeek day;
public string NamedPart;
//properties work fine too
}
...which hopefully makes it easier to have human-readable names for data with value semantics, at least until some future version of C# implements proper tuples with named ...
What is the scope of variables in JavaScript?
... of the scope chain. In strict mode, these are not permitted.
eval
In eval strings, variables declared using var will be placed in the current scope, or, if eval is used indirectly, as properties on the global object.
Examples
The following will throw a ReferenceError because the namesx, y, and z ha...