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How to import local packages without gopath
... 1.11
dep or vendor if your go version is: go 1.6 >= x < go 1.11
Manually if your go version is: x < go 1.6
Edit 3: Go 1.11 has a feature vgo which will replace dep.
To use vgo, see Modules documentation. TLDR below:
export GO111MODULE=on
go mod init
go mod vendor # if you have vendor...
How to check if a variable is set in Bash?
...
(Usually) The right way
if [ -z ${var+x} ]; then echo "var is unset"; else echo "var is set to '$var'"; fi
where ${var+x} is a parameter expansion which evaluates to nothing if var is unset, and substitutes the string x otherw...
Will iOS launch my app into the background if it was force-quit by the user?
... Unlike the application:didReceiveRemoteNotification: method, which is
called only when your app is running in the foreground, the system
calls this method when your app is running in the foreground or
background. In addition, if you enabled the remote notifications
background mode, the sys...
Something like 'contains any' for Java set?
...
Actually it will short-circuit as soon as it finds the first common element
– Xipo
Dec 15 '16 at 10:54
3
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Speed up the loop operation in R
...Biggest problem and root of ineffectiveness is indexing data.frame, I mean all this lines where you use temp[,].
Try to avoid this as much as possible. I took your function, change indexing and here version_A
dayloop2_A <- function(temp){
res <- numeric(nrow(temp))
for (i in 1:nrow(te...
Linux delete file with size 0 [duplicate]
...
This will delete all the files in a directory (and below) that are size zero.
find /tmp -size 0 -print -delete
If you just want a particular file;
if [ ! -s /tmp/foo ] ; then
rm /tmp/foo
fi
...
How to initialize a List to a given size (as opposed to capacity)?
...ount copies of the reference passed for the value parameter - so they will all refer to the same object. That may or may not be what you want, depending on your use case.
EDIT: As noted in comments, you could make Repeated use a loop to populate the list if you wanted to. That would be slightly fas...
Why use the INCLUDE clause when creating an index?
...e lowest/leaf level, rather than in the index tree.
This makes the index smaller because it's not part of the tree
INCLUDE columns are not key columns in the index, so they are not ordered.
This means it isn't really useful for predicates, sorting etc as I mentioned above. However, it may be useful...
Differences between git pull origin master & git pull origin/master
... checked-out branch.
git pull origin/master will pull changes from the locally stored branch origin/master and merge that to the local checked-out branch. The origin/master branch is essentially a "cached copy" of what was last pulled from origin, which is why it's called a remote branch in git par...
Is mathematics necessary for programming? [closed]
...m high school or fresh year college math, no more no less, and that almost all of programming tasks can be achieved without even need for advanced math. He argued, however, that algorithms are fundamental & must-have asset for programmers.
...