我读过关于将dp单元转换为像素单元的。但我无法理解0.5f。这个数字从何而来,又有何用途呢?
// The gesture threshold expressed in dp
private static final float GESTURE_THRESHOLD_DP = 16.0f;
// Get the screen's density scale
final float scale = getResources().getDisplayMetrics().density;
// Convert the dps to pixels, based on density scale
我无论如何也找不出我在putty中的这些简单的方程有什么问题。我认为一切都是正确的,但我的输出与我的教授的样本输出略有不同。
//This program is used to calculate total cost of painting.
#include <iostream>
#include <iomanip>
using namespace std;
//These are the function prototypes that will be used for the main function.
void displayInstructions(in
我正在做这个:
var refundAmount = parseFloat($('#refundAmount2').val().replace('$',''));
var refundReceived = $('#refundReceived');
var remainderAmount = refundAmount-parseFloat(refundReceived.val().replace('$',''));
alert(parseInt(remainderAmount).toFixed(2
我正在使用Excel,需要定义自定义数字格式。
If cell's value is 1 -> display "1"
If cell's value is 1.123 -> display "1.12"
If cell's value is 1.126 -> display "1.13"
If cell's value is 1324.126 -> display "1,324.13"
我使用了格式代码"#,###.00“,但不正确。如果值为1,则->显示
这基本上就是我想要做的。
// ... some code, calculations, what have you ...
long timeToAdd = returnTimeToAddInLongFormat();
// lets output the long type now, and yes i need the width and precision.
System.out.printf("Time to add: %13.10ld", timeToAdd);
我已经阅读了关于这个主题的大多数谷歌搜索,并认为我理解如何从概念上做到这一点,但JRE一直抛给我一个U
我目前正在使用此代码从表中的一列中计算总数:
function calculateTotals() {
//these will hold the totals
var hours = 0;
//reference the rows you want to add
//this will not include the header row
var rows = $("#deliverables tr:not(:first-child, :last-child)");
rows.children("td:nth-child(2)").each(function
我有一个模型的编辑视图。
@login_required
def edit(request, id):
''' Edit form '''
if id:
post = get_object_or_404(Post, pk=id)
if post.user != request.user:
return HttpResponseForbidden()
else:
post = Post()
if request.POST:
a=int("123.5")
print (a)
但为什么?错误:
Traceback (most recent call last):
File "C:/Users/pc/AppData/Local/Programs/Python/Python310/v.py", line 5, in <module>
a=int("123.5")
ValueError: invalid literal for int() with base 10: '123.5'
我需要指定两个数字在小数点后第三位是相同的: 1.2345和1.2348是正确的。但是1.2345和1.2388是不正确的。我需要让用户指定有多少地方应该程序检查。
我在想这样的事情:
do {
x = f(i++);// will count some number with i iterations
x_next = f(i++);// will count some number with i+1 iterations
} while (fabs(x - x_next) > accuracy);// there should be some difference, ca
我在这里有一个代码来求和或合计这个值,但我希望它能像小数点2位那样显示出来。我只是复制了我用过的代码,所以我对这里的代码没有概念..我只是在学习。我需要一些帮助:)
这是密码
$scope.totalPrice = function(){
var total = 0;
for(count=0;count<$scope.data.length;count++){
total += parseInt($scope.data[count].total_amount,10);
}
为什么此查询在使用等于in联接时使用/重放所有行?
MySQL 5.6架构设置
CREATE TABLE entity
(
id int(10) unsigned not null AUTO_INCREMENT,
parent_id int(10) unsigned,
title varchar(200),
path varchar(200),
primary key(id),
CONSTRAINT `SelfKey` FOREIGN KEY (`parent_id`) REFERENCES `entity` (`id`) ON DELETE NO ACTION ON UPDATE NO AC
在我的程序中,我接收到以毫秒为单位定义时间戳的字符串。现在,我需要将其转换为适当的日期。我找到的解决方案如下所示:
String aTime = "1365504203.0269";
double t = Double.parseDouble(aTime);
Date date = new Date((long)t*1000);
SimpleDateFormat dateFormatDDMMYYYY = new SimpleDateFormat("dd.MM.yyyy");
SimpleDateFormat dateFormatHHMMssSS = new S
public class ExperienceTable
{
public static int MaxExperiencePoints;
public static double PercentToNextLevel;
public static void checkLevel(Hero player)
{
if (player.ExperiencePoints >= 0)
{
player.Level = 1;
MaxExperiencePoints = 15;
我有一个包含以下列的CSV文件
ID State Email
1020202034566949 LA r1@abc.com
1020202034543245 CA r2@abc.com
1020202034521234 TX r3@abc.com
1020202034521345 TN r4@abc.com
10
当我指定了cast(measure_rate as decimal)= 100时,为什么这个查询拉取99.73 ;WITH cte AS
(
SELECT *,
ROW_NUMBER() OVER (PARTITION BY zip_code ORDER BY cast(measure_rate as decimal) DESC) AS rn
FROM AmbulatoryMeasures
where measure_rate != 'n/a'
)
SELECT *
FROM cte
WHERE rn = 1
and cast(measu