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What does the clearfix class do in css? [duplicate]
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123
How floats work
When floating elements exist on the page, non-floating elements wrap around t...
NERDTree reload new files
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You can hit R button by using feedkeys function. Just like this:
call feedkeys("R")
I have defined a function in my .vimrc file:
fun! ToggleNERDTreeWithRefresh()
:NERDTreeToggle
if(exists("b:NERDTreeType") == 1)
call feedkeys("R")
e...
In Python, how do I index a list with another list?
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A functional approach:
a = [1,"A", 34, -123, "Hello", 12]
b = [0, 2, 5]
from operator import itemgetter
print(list(itemgetter(*b)(a)))
[1, 34, 12]
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impro...
How do you check if a variable is an array in JavaScript? [duplicate]
... test: http://jsperf.com/instanceof-array-vs-array-isarray/35 So have some fun and check it out.
Note: @EscapeNetscape has created another test as jsperf.com is down. http://jsben.ch/#/QgYAV I wanted to make sure the original link stay for whenever jsperf comes back online.
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Getting a map() to return a list in Python 3.x
...t for using 3.1's map would be lazy evaluation when iterating on a complex function, large data sets, or streams.
– Andrew Keeton
Aug 20 '09 at 0:45
19
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How to escape single quotes within single quoted strings
...aped single quote and reopens the string.
I often whip up a "quotify" function in my Perl scripts to do this for me. The steps would be:
s/'/'\\''/g # Handle each embedded quote
$_ = qq['$_']; # Surround result with single quotes.
This pretty much takes care of all cases.
Life gets more...
Excel VBA App stops spontaneously with message “Code execution has been halted”
... the last 4-5 days. This worked perfectly.
– demouser123
Aug 4 '14 at 9:46
26
Does anyone know wh...
Number of lines in a file in Java
...s takes 0.35 seconds, versus 2.40 seconds when using readLines(). Just for fun, linux' wc -l command takes 0.15 seconds.
public static int countLinesOld(String filename) throws IOException {
InputStream is = new BufferedInputStream(new FileInputStream(filename));
try {
byte[] c = ne...
Should I call Close() or Dispose() for stream objects?
...YI here's an article on the MSDN blogs that explains the Close and Dispose fun. blogs.msdn.com/b/kimhamil/archive/2008/03/15/…
– JamieSee
Apr 16 '15 at 23:17
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How to split data into training/testing sets using sample function
...row(mtcars))
## set the seed to make your partition reproducible
set.seed(123)
train_ind <- sample(seq_len(nrow(mtcars)), size = smp_size)
train <- mtcars[train_ind, ]
test <- mtcars[-train_ind, ]
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