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Bubble Sort Homework
... Technically, element is not an element; it's a number representing a list index. Also, it's quite long. In these cases, just use a temporary variable name, like i for "index".
for i in range(0, length):
The range command can also take just one argument (named stop). In that case, you get a list o...
How can I see what has changed in a file before committing to git?
...on, there are three useful ways to use git diff:
Show differences between index and working tree; that is, changes you haven't staged to commit:
git diff [filename]
Show differences between current commit and index; that is, what you're about to commit (--staged does exactly the same thing, use ...
Extract month and year from a zoo::yearmon object
... as.yearmon("Mar 2012", "%b %Y")
Then we can extract the date parts as required:
> format(date1, "%b") ## Month, char, abbreviated
[1] "Mar"
> format(date1, "%Y") ## Year with century
[1] "2012"
> format(date1, "%m") ## numeric month
[1] "03"
These are returned as characters. Where app...
How do you select a particular option in a SELECT element in jQuery?
If you know the Index, Value or Text. also if you don't have an ID for a direct reference.
21 Answers
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Using OpenGl with C#? [closed]
...ss RGB values as separate args
Gl.glVertex3f(0, 1, 0); // explicit "f" qualifier
This makes for harder porting but is incredibly nice to use.
As a bonus it provides font rendering, texture loading, input handling, audio, math...
Update 18th January 2016: Today the OpenTK maintainer has stepped ...
adding noise to a signal in python
...d: {sd}")
data_df = pd.DataFrame(data, columns=['Value'])
data_df['Index'] = data_df.index.values
# Adding gaussian jitter
jitter = 0.3*rnd_state.normal(mu, sd, size=data_df.shape[0])
data_df['with_jitter'] = data_df['Value'] + jitter
index_further_away = None
if add_an...
Vim: Delete buffer without losing the split window
...avior has bugged me a lot! btw, latest version of bufkill is at github.com/qpkorr/vim-bufkill
– fsrechia
Jan 12 '17 at 12:06
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Sort Dictionary by keys
...rate over both the keys and the values in a key sorted order, this form is quite succinct
let d = [
"A" : [1, 2],
"Z" : [3, 4],
"D" : [5, 6]
]
Swift 1,2:
for (k,v) in Array(d).sorted({$0.0 < $1.0}) {
println("\(k):\(v)")
}
Swift 3+:
for (k,v) in Array(d).sorted(by: {$0.0 < $1...
What is the use of the square brackets [] in sql statements?
I've noticed that Visual Studio 2008 is placing square brackets around column names in sql. Do the brackets offer any advantage? When I hand code T-SQL I've never bothered with them.
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Is there an R function for finding the index of an element in a vector?
In R, I have an element x and a vector v . I want to find the first index of an element in v that is equal to x . I know that one way to do this is: which(x == v)[[1]] , but that seems excessively inefficient. Is there a more direct way to do it?
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