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Generating random numbers in Objective-C
... = (((float)arc4random()/0x100000000)*(high_bound-low_bound)+low_bound);
Convert result to a rounder Integer value:
int intRndValue = (int)(rndValue + 0.5);
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How to go about formatting 1200 to 1.2k in java
... This code is sensitive to locale, for example in sv_SE locale 1000 converts to 10x10³, which is not matched correctly by the regexp.
– Joakim Lundborg
Feb 5 '14 at 22:53
2...
Best way to work with dates in Android SQLite [closed]
... date column.
Retrieving dates as strings from SQLite you can then format/convert them as required into local regionalised formats using the Calendar or the android.text.format.DateUtils.formatDateTime method.
Here's a regionalised formatter method I use;
public static String formatDateTime(Conte...
How do I convert an interval into a number of hours with postgres?
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If you convert table field:
Define the field so it contains seconds:
CREATE TABLE IF NOT EXISTS test (
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field INTERVAL SECOND(0)
);
Extract the value. Remember to cast to int other wise you can get an unple...
Convert InputStream to byte array in Java
How do I read an entire InputStream into a byte array?
34 Answers
34
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LR性能指标解释 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...。
4.JMap。监控java程序是否有内存泄漏，需要配合eclipse插件或者MemoryAnalyzer来使用。
5.JProfiler。全面监控每个节点的CPU使用率、内存使用率、响应时间累计值、线程执行情况等，需要在JVM参数中进行配置。
6.Nmon。全面监控linux...
Why does dividing two int not yield the right value when assigned to double?
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I would prefer to explicitly convert both a and b to double simply for clarity, but it really doesn't matter.
– John Dibling
Sep 27 '11 at 15:31
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How to iterate over values of an Enum having flags?
...lt;Enum> GetFlags(Enum value, Enum[] values)
{
ulong bits = Convert.ToUInt64(value);
List<Enum> results = new List<Enum>();
for (int i = values.Length - 1; i >= 0; i--)
{
ulong mask = Convert.ToUInt64(values[i]);
if (i == ...
Java: Get month Integer from Date
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java.time (Java 8)
You can also use the java.time package in Java 8 and convert your java.util.Date object to a java.time.LocalDate object and then just use the getMonthValue() method.
Date date = new Date();
LocalDate localDate = date.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
in...
Merging two arrays in .NET
...ds up: if you only want to iterate through the combined result, no need to convert it to an array. That final operation does an array copy. It won't have to do that if you iterate through an IEnumerable<int>. Of course, there could be good reasons to have it be an array.
–...