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Diff output from two programs without temporary files
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Use <(command) to pass one command's output to another program as if it were a file name. Bash pipes the program's output to a pipe and passes a file name like /dev/fd/63 to the outer command.
diff <(./a) <(./b)
Similarly you can use >(...
Gson custom seralizer for one variable (of many) in an object using TypeAdapter
...delegate = gson.getDelegateAdapter(this, type);
final TypeAdapter<JsonElement> elementAdapter = gson.getAdapter(JsonElement.class);
return new TypeAdapter<C>() {
@Override public void write(JsonWriter out, C value) throws IOException {
JsonElement tree = delegate.to...
What is Unicode, UTF-8, UTF-16?
...d were a few control characters, punctuation, numbers and letters like the ones in this sentence. Unfortunately, today's strange world of global intercommunication and social media was not foreseen, and it is not too unusual to see English, العربية, 汉语, עִבְרִית, ελληνικά,...
Why does the month argument range from 0 to 11 in JavaScript's Date constructor?
...1 based days that are the oddballs here...oddly enough. Why was this was done? I don't know...but probably happened the same meeting they got plastered and decided semicolons were optional.
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Django DB Settings 'Improperly Configured' Error
...ings, Django doesn't know what project you want to work on. You have to do one of these things:
Use python manage.py shell
Use django-admin.py shell --settings=mysite.settings (or whatever settings module you use)
Set DJANGO_SETTINGS_MODULE environment variable in your OS to mysite.settings
(This ...
How to count TRUE values in a logical vector
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Another option which hasn't been mentioned is to use which:
length(which(z))
Just to actually provide some context on the "which is faster question", it's always easiest just to test yourself. I made the vector much larger for comparison:
z <- sample(c(TR...
How to center a “position: absolute” element
...ng an element that has the attribute position set to absolute .
Does anyone know why the images are not centered?
26 Ans...
MySQL - UPDATE multiple rows with different values in one query
...ssumes that the user_rol, cod_office combination is a primary key. If only one of these is the primary key, then add the other field to the UPDATE list.
If neither of them is a primary key (that seems unlikely) then this approach will always create new records - probably not what is wanted.
However...
Finding Key associated with max Value in a Java Map
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+1: You can have more than one key with the same maximum value. This loop will give you the first one it finds.
– Peter Lawrey
May 6 '11 at 12:19
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Adding a column to a data.frame
... c(1:4, 1:7, 1:5), h_freq = runif(16), h_freqsq = runif(16))
# find where one appears and
from <- which(your.df$no == 1)
to <- c((from-1)[-1], nrow(your.df)) # up to which point the sequence runs
# generate a sequence (len) and based on its length, repeat a consecutive number len times
get....