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What is “vectorization”?
...thmetic operation. eg. if we want to add 10 to value if it is greater then 100. we can either.
if(x[i] > 100) x[i] += 10; // this will branch execution flow.
or we can model the condition into arithmetic operation creating a condition vector c,
c[i] = x[i] > 100; // storing the condition ...
How to find the length of a string in R
... uq max neval
nchar(x) 11.868 12.776 13.1590 13.6475 41.815 100
str_length(x) 30.715 33.159 33.6825 34.1360 173.400 100
stri_length(x) 2.653 3.281 4.0495 4.5380 19.966 100
and also works fine with NA's
nchar(NA)
## [1] 2
stri_length(NA)
## [1] NA
...
Remove empty elements from an array in Javascript
...e(/(\r\n|\n|\r)/gm,"")});
Example:
arr = ["hello",0,"",null,undefined,1,100," "]
arr.filter(function(e){return e});
Return:
["hello", 1, 100, " "]
UPDATE (based on Alnitak's comment)
In some situations you may want to keep "0" in the array and remove anything else (null, undefined and "")...
How do I parse a string with a decimal point to a double?
...
this code doesn't work for a number like 100.35 if the system culture uses a comma as the separator. you'd expect it to return a number of about 100, but it returns 10035.
– Lennart
Aug 6 at 11:31
...
AWS Error Message: A conflicting conditional operation is currently in progress against this resourc
...ets or replace buckets, it is not healthy.
Note that you have a limit of 100 buckets for an account (see here). EDIT: Now this limit is a "soft limit" and you can increase it if needed.
Also note that a creation of a bucket takes time and:
...it is not appropriate to make bucket create or de...
trying to animate a constraint in swift
...
SWIFT 4.x :
self.mConstraint.constant = 100.0
UIView.animate(withDuration: 0.3) {
self.view.layoutIfNeeded()
}
Example with completion:
self.mConstraint.constant = 100
UIView.animate(withDuration: 0.3, animations: {
self.view.layoutIfNeeded()
...
My attempt at value initialization is interpreted as a function declaration, and why doesn't A a(())
...classes which takes two arguments is std::string
std::string hundred_dots(100, '.');
This is all well and fine (technically, it would have most vexing parse if it would be written as std::string wat(int(), char()), but let's be honest - who would write that? But let's assume this code has a vexin...
Why start an ArrayList with an initial capacity?
... of wasted space changed over time, being 0% some of the time and close to 100% some of the time. Changing the factor from 2 to 1.5 or 4 or 100 or whatever changes the average amount of wasted space and the average amount of time spent copying, but the time complexity remains linear on average no ma...
How do I replace a character at a particular index in JavaScript?
...
100
There is no replaceAt function in JavaScript. You can use the following code to replace any ch...
WheelView 拓展：滚轮选择框扩展，滚轮日历选择框和旋转日历扩展 · App In...
...
Wheel Calendar 扩展
Wheel Calendar 扩展提供了一个可自定义的交互式日历选择框，采用滚轮设计，让用户可以轻松地在应用中集成日期选择功能。无论您是构建调度应用、表单还是任何需要日期选择的应用，轮盘日历选...