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Check whether number is even or odd
...r. (A % B) itself can be used as an expression, and that's when things get fun.
– Stefan Kendall
Sep 8 '11 at 1:59
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Error : BinderProxy@45d459c0 is not valid; is your activity running?
...ple code in Kotlin:
Dialog manager class:
class DialogManager {
fun showAlertDialog(weakActivity: WeakReference<Activity>) {
How can you automatically remove trailing whitespace in vim
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Compilation of above plus saving cursor position:
fun! <SID>StripTrailingWhitespaces()
let l = line(".")
let c = col(".")
keepp %s/\s\+$//e
call cursor(l, c)
endfun
autocmd FileType c,cpp,java,php,ruby,python autocmd BufWritePre <buffer> :call &l...
Last iteration of enhanced for loop in java
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Although the code is more slick/neat/fun, it is less obvious than the if version. Always use the more obvious/readable version.
– Bill K
Nov 13 '08 at 19:07
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Python __str__ and lists
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Two easy things you can do, use the map function or use a comprehension.
But that gets you a list of strings, not a string. So you also have to join the strings together.
s= ",".join( map( str, myList ) )
or
s= ",".join( [ str(element) for element in myList ]...
Change text color of one word in a TextView
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I implemented a utility function in Kotlin for my own usecase and maybe useful for someone else.
fun getCusomTextWithSpecificTextWithDiffColor(textToBold: String, fullText: String,
targetColor: Int)...
What is the best comment in source code you have ever encountered? [closed]
... The first time I've ever been truly RickRolled - and it was funny. When I see links to YouTube I always expect to be RickRolled (camel cased English!!), but I never never never expected to be RickRolled in code comments.
– Vincent McNabb
Jul 28 '...
How do I dump an object's fields to the console?
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Using introspection is part of the fun of Ruby. It's often useful to subtract an Object's instance_methods from the class' in question to get the methods that are unique: (String.instance_methods - Object.instance_methods).sort
– the Tin ...
Numbering rows within groups in a data frame
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Use ave, ddply, dplyr or data.table:
df$num <- ave(df$val, df$cat, FUN = seq_along)
or:
library(plyr)
ddply(df, .(cat), mutate, id = seq_along(val))
or:
library(dplyr)
df %>% group_by(cat) %>% mutate(id = row_number())
or (the most memory efficient, as it assigns by reference w...
Place cursor at the end of text in EditText
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There is a function called append for ediitext which appends the string value to current edittext value and places the cursor at the end of the value.
You can have the string value as the current ediitext value itself and call append();...