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How to check iOS version?
...ion:
if let version = Float(UIDevice.current.systemVersion), version < 9.3 {
//add lower than 9.3 code here
} else {
//add 9.3 and above code here
}
Current versions of swift should be using this:
if #available(iOS 12, *) {
//iOS 12 specific code here
} else {
//older than iOS...
How to combine multiple conditions to subset a data-frame using “OR”?
...
my.data.frame <- subset(data , V1 > 2 | V2 < 4)
An alternative solution that mimics the behavior of this function and would be more appropriate for inclusion within a function body:
new.data <- data[ which( data$V1 > 2 | data$V2 < 4) , ]
...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...loat sY, float nfX, float nfY, float nsX, float nsY)
{
float v1x = fX-sX;
float v1y = -(fY-sY);
float v2x = nfX-nsX;
float v2y = -(nfY-nsY);
float angle1 = normalizeAngle((float) Math.atan2(v1y, v1x),v1x,v1y);
float angle2 = normalizeAngle((...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...loat sY, float nfX, float nfY, float nsX, float nsY)
{
float v1x = fX-sX;
float v1y = -(fY-sY);
float v2x = nfX-nsX;
float v2y = -(nfY-nsY);
float angle1 = normalizeAngle((float) Math.atan2(v1y, v1x),v1x,v1y);
float angle2 = normalizeAngle((...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...loat sY, float nfX, float nfY, float nsX, float nsY)
{
float v1x = fX-sX;
float v1y = -(fY-sY);
float v2x = nfX-nsX;
float v2y = -(nfY-nsY);
float angle1 = normalizeAngle((float) Math.atan2(v1y, v1x),v1x,v1y);
float angle2 = normalizeAngle((...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...loat sY, float nfX, float nfY, float nsX, float nsY)
{
float v1x = fX-sX;
float v1y = -(fY-sY);
float v2x = nfX-nsX;
float v2y = -(nfY-nsY);
float angle1 = normalizeAngle((float) Math.atan2(v1y, v1x),v1x,v1y);
float angle2 = normalizeAngle((...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...loat sY, float nfX, float nfY, float nsX, float nsY)
{
float v1x = fX-sX;
float v1y = -(fY-sY);
float v2x = nfX-nsX;
float v2y = -(nfY-nsY);
float angle1 = normalizeAngle((float) Math.atan2(v1y, v1x),v1x,v1y);
float angle2 = normalizeAngle((...
Split delimited strings in a column and insert as new rows [duplicate]
...a,c\n3|b,d\n4|e,f"), header = F, sep = "|", stringsAsFactors = F)
df
## V1 V2
## 1 1 a,b,c
## 2 2 a,c
## 3 3 b,d
## 4 4 e,f
s <- strsplit(df$V2, split = ",")
data.frame(V1 = rep(df$V1, sapply(s, length)), V2 = unlist(s))
## V1 V2
## 1 1 a
## 2 1 b
## 3 1 c
## 4 2 a
## 5...
基于Windows平台的反Rootkit原理与实现 PDF - 文档下载 - 清泛网 - 专注C/C++及内核技术
.... ................................ ................................ .. 67
9.3 PE 9.3 PE文件的签名及验证实现 ................................ ................................ ............. 67
9.4 本章小结 ................................ ................................ .................
Fancybox doesn't work with jQuery v1.9.0 [ f.browser is undefined / Cannot read property 'msie' ]
Fancybox breaks with the new jQuery v1.9.0.
4 Answers
4
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