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How to use the “number_to_currency” helper method in the model rather than view?
...ed it for you. This is still not great, as you shouldn’t access a helper from a model.
Violate MVC & SRP. See fguillen’s answer for how to do this. I won’t echo it here because I don’t agree with it. Even more so, though, do I disagree with polluting your model with presentation methods ...
What does the 'static' keyword do in a class?
...thod because the OP did. If instead it was a public method that was called from elsewhere, and the Hello class was instantiated more than once, then it could create a Clock instance for each Hello instance, unless clock was static.
– Paul Tomblin
Sep 3 '17 at 2...
Ignoring accented letters in string comparison
...mpareOptions.IgnoreNonSpace);
Here's a function that strips diacritics from a string:
static string RemoveDiacritics(string text)
{
string formD = text.Normalize(NormalizationForm.FormD);
StringBuilder sb = new StringBuilder();
foreach (char ch in formD)
{
UnicodeCategory uc = Char...
How to throw an exception in C?
...tion of the setjmp() and longjmp() functions, defined in setjmp.h. Example from Wikipedia
#include <stdio.h>
#include <setjmp.h>
static jmp_buf buf;
void second(void) {
printf("second\n"); // prints
longjmp(buf,1); // jumps back to where setjmp
...
Calculate age given the birth date in the format YYYYMMDD
...- birthday.getTime();
var ageDate = new Date(ageDifMs); // miliseconds from epoch
return Math.abs(ageDate.getUTCFullYear() - 1970);
}
Disclaimer: This also has precision issues, so this cannot be completely trusted either. It can be off by a few hours, on some years, or during daylight sav...
Relative paths based on file location instead of current working directory [duplicate]
...
This will make your shell script work independent of where you invoke it from. Each time you run it, it will be as if you were running ./cat.sh inside dir.
Note that this script only works if you're invoking the script directly (i.e. not via a symlink), otherwise the finding the current location ...
Best way to determine user's locale within browser
...
From MDN developer.mozilla.org/en-US/docs/Web/API/NavigatorLanguage/… "The Accept-Language HTTP header in every HTTP request from the user's browser uses the same value for the navigator.languages property except for the ex...
Representing graphs (data structure) in Python
How can one neatly represent a graph in Python ? (Starting from scratch i.e. no libraries!) What data structure (e.g. dicts/tuples/dict(tuples)) will be fast but also memory efficient? One must be able to do various graph operations on it.
As pointed out, the various graph representations...
Why does changing 0.1f to 0 slow down performance by 10x?
...amplitude (not audible) DC or or square wave signal to jitter numbers away from denormality.
– Russell Borogove
Feb 17 '12 at 0:12
16
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Side-by-side plots with ggplot2
...
You can use the following multiplot function from Winston Chang's R cookbook
multiplot(plot1, plot2, cols=2)
multiplot <- function(..., plotlist=NULL, cols) {
require(grid)
# Make a list from the ... arguments and plotlist
plots <- c(list(...), ...