variables

问题 For any algorithmic problem, an error of 10 -6 is allowed. I declared a long double as a variable in my first solution and got a WA. But, when I declared a variable as double , I got an AC. I want to know why this decision was made because long double is known to be more accurate than double . I have not changed anything except variables, output methods. Here is my code: #include <iostream> #include <string> #include <cmath> #include <vector> #include <queue> #include <deque> #include

问题 This question already has answers here : PHP take string and check if that string exists as a variable (3 answers) Closed 5 years ago . I have a field that depends has custom text if a certain condition is met...and if it isn't the field is blank. I have written a custom function test if a variable is set function AmISet($fieldName) { if (isset($fieldName)) { echo "I am set"; }else{ echo "I am not set"; } }; but when I attach it the field I get an error that the variable is undefined. But

问题 My head is probably in the wrong place with this, but I want to put a variable within a variable. My goal for this script is to compare current versions of clients software with current software versions that are available from the vendor. At this stage I just want to print out what's available. I have some def's setup with: def v80(program_1 = '80.24', program_2 = '80.5', program_3 = '80.16'): pass def v81(program_1 = '81.16', program_2 = '81.7', program_3 = '81.14'): pass def v82(program_1

问题 My head is probably in the wrong place with this, but I want to put a variable within a variable. My goal for this script is to compare current versions of clients software with current software versions that are available from the vendor. At this stage I just want to print out what's available. I have some def's setup with: def v80(program_1 = '80.24', program_2 = '80.5', program_3 = '80.16'): pass def v81(program_1 = '81.16', program_2 = '81.7', program_3 = '81.14'): pass def v82(program_1

问题 I need to calculate the max and min of the wave height according to the direction from which it comes, that is to say, I have two variables: Hs (wave height) Direction (direction of the swell) And I need to know the maximum wave height for waves with a direction between 11.25 and 33.75 degrees. For now, use the function: Max (Hs [Direction [11.25: 33.75])) But I do not agree the result with the data that I have. 回答1: Assume your dataframe is called df , your variables are called Hs and

问题 I have a CFQUERY pulling three columns. The following CFSELECT allows the user to make a selection from various results based on the 'display' parameter, and sets the value to the 'value' parameter. I would like to pass the third unused value of that record to a variable to be used in a later query. I cannot set the 'value' field to the column I need since that value is needed in a query following this one (queries populate based on previous drop down selections). Is there a way to do this?

问题 Let's take some pseudo-Mootools code: for loop (i) from 0 to 5 { create.element { id: 'element_'+i } $('element_'+i).addevent.click { alert(i); } } The events get added to the elements properly. However, when clicked, they'll all alert the latest iterator... which would be 5. Is there any way I can change "alert(i)" in the event to alert the iterator at that point in time? .toString didn't do much. 回答1: http://www.jsfiddle.net/dimitar/sbytJ/1/ for (var ii = 0; ii < 5; ++ii) { new Element("div

问题 Let's take some pseudo-Mootools code: for loop (i) from 0 to 5 { create.element { id: 'element_'+i } $('element_'+i).addevent.click { alert(i); } } The events get added to the elements properly. However, when clicked, they'll all alert the latest iterator... which would be 5. Is there any way I can change "alert(i)" in the event to alert the iterator at that point in time? .toString didn't do much. 回答1: http://www.jsfiddle.net/dimitar/sbytJ/1/ for (var ii = 0; ii < 5; ++ii) { new Element("div

问题 i am trying to make a cript which displays a embeded code of yahoo graph embeded script is <embed bgcolor="#dbdbd3" flashvars="lcId=1169793726234&state=symbol%3D^nsebank;range=1d;indicator=ema(13,34,55)+macd+rsi+stochasticfast;charttype=candlestick;crosshair=on;ohlcvalues=0;logscale=on;source=undefined" loop="false" menu="false" name="BANKNIFTY" pluginspage="http://www.macromedia.com/go/getflashplayer" src="http://us.js2.yimg.com/us.yimg.com/i/us/fi/yfc/swf/flashchart_1.18.swf" style="height:

问题 I know the basic rule regarding the multiple assignment in Python: all expressions at the right part of the assignment are evaluated first then evaluated values are bound to variables at the left part But actually I encountered something quite different and a little more complicated; I would like to know if I may rely on it. While debugging an algorithm, I suddenly discovered that a bug was related to the line: k[s], k[p] = k[p], None Because my algorithm found a case where s and p were equal