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How do I generate random numbers in Dart?
...in() {
var rng = new Random();
for (var i = 0; i < 10; i++) {
print(rng.nextInt(100));
}
}
This code was tested with the Dart VM and dart2js, as of the time of this writing.
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Incompatible implicit declaration of built-in function ‘malloc’
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You need to #include <stdlib.h>. Otherwise it's defined as int malloc() which is incompatible with the built-in type void *malloc(size_t).
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How to copy files from 'assets' folder to sdcard?
...utStream out) throws IOException {
byte[] buffer = new byte[1024];
int read;
while((read = in.read(buffer)) != -1){
out.write(buffer, 0, read);
}
}
Reference : Move file using Java
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Difference between map, applymap and apply methods in Pandas
...too. Suppose you wanted to compute a formatted string from each floating point value in frame. You can do this with applymap:
In [120]: format = lambda x: '%.2f' % x
In [121]: frame.applymap(format)
Out[121]:
b d e
Utah -0.03 1.08 1.28
Ohio 0.65 0.83 -1.55
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Getting Java version at runtime
... cut the string to its first dot character, if one exists.
private static int getVersion() {
String version = System.getProperty("java.version");
if(version.startsWith("1.")) {
version = version.substring(2, 3);
} else {
int dot = version.indexOf(".");
if(dot != ...
How do we count rows using older versions of Hibernate (~2009)?
... As @Salandur suggests, "It is at least a Number", and Number type has "intValue()", "longValue()" methods, so we can easily get the desired primitive type we want: ((Number) criteria.uniqueResult()).intValue()
– Jerry Tian
Feb 22 '12 at 3:28
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How to split/partition a dataset into training and test datasets for, e.g., cross validation?
What is a good way to split a NumPy array randomly into training and testing/validation dataset? Something similar to the cvpartition or crossvalind functions in Matlab.
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What is the difference between the | and || or operators?
...wo usages? Are there any caveats when using one over the other or are they interchangeable?
12 Answers
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怎么往SetTimer的回调函数传递参数 - C/C++ - 清泛网 - 专注C/C++及内核技术
...vs2005或VC建立一个Win32工程，然后看自动生成的代码：
int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
...
// 主消息循环:
while (G...
Using awk to remove the Byte-order mark
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In addition to converting CRLF line endings to LF, dos2unix also removes BOMs:
dos2unix *.txt
dos2unix also converts UTF-16 files with a BOM (but not UTF-16 files without a BOM) to UTF-8 without a BOM:
$ printf '\ufeffä\n'|iconv -f utf...