numbers

PHP - Correct way to add space between numbers?

由 点点圈 提交于 2020-01-24 05:42:19
问题 Probably a simple problem if you know the answer. What I have Numbers with no spaces. $str = 10000; $str2 = 100000; What I want Convert above to below... $str = '10 000'; $str2 = '100 000'; Own thoughts I thought of some strpos, regexp, str_replace but is it really the way to solve this? I will accept the most correct, short code answer with no lack of speed. 回答1: Use number_format function. With space for thoudsandsSparator as below. number_format($number, 0, '.', ' ') Codepad Demo. 回答2:

Inputting a Equation in Textfield and Processing it? [actionscript 3.0]

由 ε祈祈猫儿з 提交于 2020-01-23 19:28:41
问题 I would like to know if theirs a way where you can type in a text field something like "5*5". And then on enter, the document would take the database and be able to return 25. I am quite confused due to the fact that content that you input into a textfield must be a String and when you use the Number() converter the system gets confused. 回答1: You'll need to break your string apart at operators (using regex) and then keep those operators. I don't have the patience to do this myself but you'll

Inputting a Equation in Textfield and Processing it? [actionscript 3.0]

由 谁说我不能喝 提交于 2020-01-23 19:28:19
问题 I would like to know if theirs a way where you can type in a text field something like "5*5". And then on enter, the document would take the database and be able to return 25. I am quite confused due to the fact that content that you input into a textfield must be a String and when you use the Number() converter the system gets confused. 回答1: You'll need to break your string apart at operators (using regex) and then keep those operators. I don't have the patience to do this myself but you'll

Java: many ways of casting a (long) Object to double

由 核能气质少年 提交于 2020-01-23 04:55:08
问题 I have an Object obj that I know is actually a long . In some Math code I need it as double . Is it safe to directly cast it to double? double x = (double)obj; Or should I rather cast it first to long and then to double. double x = (double)(long)obj; I also found another (less readable) alternative: double x = new Long((long)obj).doubleValue(); What are the dangers/implications of doing either? Solution Summary : obj is a Number and not a long . Java 6 requires explicit casting, e.g.: double

How to run with various number of user at different times in Jmeter

由 China☆狼群 提交于 2020-01-22 03:01:11
问题 I want to run login request with different number of users: 10, 20, 30 and generate report with number of users, and response time. I created CSV file with number of threads: 10, 20, 30 I assigned thread number variable into Number of Thread in Thread group but it does not run. 回答1: You need to use property, call JMeter batch with different property value, with 10 threads for example jmeter -JthreadNum=10 -t myJmx.jmx And in your Test Plan get the property in your Number of Threads: ${__P

C++ lambda 函数

由 瘦欲@ 提交于 2020-01-21 19:39:01
相比于函数，lambda表达式的使用更加直观，在查看某一函数的具体功能实现无需大量翻阅工程代码去找某一函数的具体实现。 lambda 表达式使用方法 ： []() mutable ->return-type{} [] lambda 可访问作用域内的任何动态变量，要捕获使用的变量，可将其名称放在中括号内，有以下几种方式：。 (1) [Z] 将按照值传递方式访问变量； (2) [=]将按照值传递方式访问所有变量（包括this）； (3)[&Count]将按照引用方式访问变量； (4)[&]将按照引用方式访问所有变量（包括this）； (5)[this]表示值传递方式捕捉当前的this指针 () 参数选项，与普通函数参数一样，可以为空，如果不需要传递参数可以省略括号。 mutable 修饰符。默认情况下，Lambda函数总是一个const函数，mutable可以取消其常量性。在使用该修饰符时，参数列表不可省略（即使参数为空）; .->return-type 返回类型。可以在不需要返回值的时候也可以连同符号”->”一起省略。并且在返回类型明确的情况下，也可以省略该部分，让编译器对返回类型进行推导; {} ：函数体。内容与普通函数一样，不过除了可以使用参数之外，还可以使用所有访问的变量。 对比函数指针、函数符、lambda函数 使用实例： #include <iostream>

Android number format is wrong somehow, instead of 3.5 I get 3.499999999, why?

由 江枫思渺然 提交于 2020-01-21 14:39:12
问题 I store some data in a database and I read those data with a cursor. All the data are 56.45 , 3.04, 0.03 type, so two numbers after the decimal point. Now I would like to sum them but it doesnt seem to be easy... I get those number with c.getDouble(3) then I add it to the sum variable like: sum+= c.getDouble(4) * multi multi is an integer between 1 and 100. Now my problem is that, after getting the sum variable I get a number like: 59.51999999999999999. I do not post a code, but there is no

Defining cross-platform money_format function (Linux and Windows)

由 邮差的信 提交于 2020-01-21 04:50:43
问题 I have read that money_format is not available on windows, and on some Linux distributions (i.e. BSD 4.11 variants). But I want to write cross-platform library using normal function, when available and using this workaround when not, so my library will be able to run on every PHP-based web server. Is there any simple solution to check whether built-in function is available and if not to include the solution from above? 回答1: The function money_format() is only defined if the system has strfmon

Mongodb PHP - Integers with decimals

由 ぐ巨炮叔叔 提交于 2020-01-20 08:10:18
问题 This is a follow up to another post i made about inserting an integer into mongodb. I have this working just fine by using the (int) but now when it inserts the number into the db is strips everything after the decimal. So if i had 154.65 it would be inserted into the mongodb as 154 with nothing after the decimal. My question is how do i get this to keep all numbers after the decimal? Also if anyone has a link to these sting/numeric functions i'd appreciate a reference. Thanks. $number["xyz"]

Default Number of Decimal Places to Output in PHP

由 无人久伴 提交于 2020-01-20 05:23:45
问题 I do my php work on my dev box at home, where I've got a rudimentary LAMP setup. When I look at my website on my home box, any numbers I echo are automatically truncated to the least required precision. Eg 2 is echoed as 2, 2.2000 is echoed as 2.2. On the production box, all the numbers are echoed with at least one unnecessary zero, eg 100 becomes 100.0. On both boxes, the PHP version is 5.2.5. Does anyone know offhand if there is a setting I can change which will force PHP to automatically
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