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c++提取复数的实部和虚部 - C/C++ - 清泛网 - 专注C/C++及内核技术
.../ 结尾的i的位置
for (int i = len-1; i >-1; i--)
{
if ('i' == strCplx[i])
iPos = i;
else if ('+' == strCplx[i] || '-' == strCplx[i])
{
signPos = i;
break;
}
}
if (0 == iPos) // 纯虚数i
{
...
导盲项目：什么场景非得用相机预览？按杖上按钮或定时拍照，识别后语音提醒...
...
global 就绪 = false
global 忙碌 = false
procedure 请求拍照() {
if (就绪 and not 忙碌) {
忙碌 = true
标签_状态.Text = "拍照中…"
实时预览录制1.CapturePhoto()
}
}
when Screen1.Initialize() {
Screen1.AskForPermission("android.permission.CAMERA")
}
when ...
Numpy first occurrence of value greater than existing value
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Just a word of caution: if there's no True value in its input array, np.argmax will happily return 0 (which is not what you want in this case).
– ambrus
Feb 7 '14 at 13:15
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Finding Number of Cores in Java
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int cores = Runtime.getRuntime().availableProcessors();
If cores is less than one, either your processor is about to die, or your JVM has a serious bug in it, or the universe is about to blow up.
share
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How to compare binary files to check if they are the same?
...siest way (using a graphical tool or command line on Ubuntu Linux) to know if two binary files are the same or not (except for the time stamps)? I do not need to actually extract the difference. I just need to know whether they are the same or not.
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How to tell if browser/tab is active [duplicate]
I have a function that is called every second that I only want to run if the current page is in the foreground, i.e. the user hasn't minimized the browser or switched to another tab. It serves no purpose if the user isn't looking at it and is potentially CPU-intensive, so I don't want to just waste ...
How to check if an activity is the last one in the activity stack for an application?
I want to know if user would return to the home screen if he exit the current activity.
10 Answers
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How to check that a string is an int, but not a double, etc.?
...integer beforehand, so that I can give a helpful error message to the user if it's wrong. PHP has is_int() , but that returns false for string like "2" .
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Is there a way to check if int is legal enum in C#?
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Check out Enum.IsDefined
Usage:
if(Enum.IsDefined(typeof(MyEnum), value))
MyEnum a = (MyEnum)value;
This is the example from that page:
using System;
[Flags] public enum PetType
{
None = 0, Dog = 1, Cat = 2, Rodent = 4, Bird = 8, Reptile = 16...
How to install a specific version of a ruby gem?
Using the command-line gem tool, how can I install a specific version of a gem?
6 Answers
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