expression

问题 In Spel, it is easy to assign some values for a List property. For example having object foo with a property defined as List, I usually do: SpelParserConfiguration config = new SpelParserConfiguration(true,true); ExpressionParser parser = new SpelExpressionParser(config); Foo foo = new Foo(); EvaluationContext context = new StandardEvaluationContext(foo); parser.parseExpression("barList[1].test='11111111'") .getValue(context); But what do you do for the case you want to assign values for a

问题 I want to use subscripts within each factor in a ggplot barplot. d = structure(list(env = structure(c(1L, 3L, 4L, 2L, 5L, 7L, 6L), .Label = c("mean SS", "50% O2 @ 25 °C", "50% O2 @ 0 °C", "50% O2 @ 10 °C", "anoxic @ 0 °C", "anoxic @ 25 °C", "anoxic @ 10 °C"), class = "factor"), pco2_inc = c(60, 138.652445968464, 144.328210839879, 112.560395996095, 173.615572249453, 234.86228704132, 209.102964222973)), class = "data.frame", row.names = c(NA, -7L)) Given the data.frame above, I want to produce

问题 I want to use subscripts within each factor in a ggplot barplot. d = structure(list(env = structure(c(1L, 3L, 4L, 2L, 5L, 7L, 6L), .Label = c("mean SS", "50% O2 @ 25 °C", "50% O2 @ 0 °C", "50% O2 @ 10 °C", "anoxic @ 0 °C", "anoxic @ 25 °C", "anoxic @ 10 °C"), class = "factor"), pco2_inc = c(60, 138.652445968464, 144.328210839879, 112.560395996095, 173.615572249453, 234.86228704132, 209.102964222973)), class = "data.frame", row.names = c(NA, -7L)) Given the data.frame above, I want to produce

问题 I got a CSV like below. The column got some empty rows and the CSV gives the values as a string. But I want to make it a float like ‘3.00000’ with 5 decimals. First, I need to replace the ‘,’ symbol and replace the null values I used this derived column expression: (DT_R8)REPLACE(ISNULL(Col1) ? "0.0000" : Col1,",",".") but it is not working. Do you guys know a better expression? The column is like below: +---------+ | Col1 | +---------+ | 3,00000 | | | | 4,00000 | | 6.56565 | | | | 4.54545 |

问题 I have data frame that has a column with large number of file names like: d <- c("harry11_scott80_norm.avi","harry11_norm.avi","harry11_scott80_lpf.avi", "joel51_lpf.avi","rich82_joel51_lpf.avi") I want R to replace all expressions with two people names like harry11_scott80_norm.avi with the expression incongruent and all the ones with single person name like harry11_norm.avi with congruent . I could use gsub to do that: dd <- gsub("harry11_scott80_norm.avi", "incongruent", d) but I got a lot

问题 guys! I want to ask you how can a make a function, that checks if the brackets in a string are put correctly. For example "(a + b).4,2 - )c + 5)" and I have to check the brackets. I tried something, but it doesn't seem to work(sorry, I'm a newbie in javascript): function checkBrackets(str){ var newOrder = []; var bracket1 = "("; var bracket2 = ")"; for(var bracket1 in str){ newOrder.push("1"); } for(bracket2 in str){ newOrder.pop(); } if(newOrder.length == 0){ console.log("Right!" + newOrder)

问题 guys! I want to ask you how can a make a function, that checks if the brackets in a string are put correctly. For example "(a + b).4,2 - )c + 5)" and I have to check the brackets. I tried something, but it doesn't seem to work(sorry, I'm a newbie in javascript): function checkBrackets(str){ var newOrder = []; var bracket1 = "("; var bracket2 = ")"; for(var bracket1 in str){ newOrder.push("1"); } for(bracket2 in str){ newOrder.pop(); } if(newOrder.length == 0){ console.log("Right!" + newOrder)

问题 This question already has answers here : How do I format a number in Java? (9 answers) Closed 3 years ago . I'm having a problem involving formatting a number. Here in Brazil we got a type of document called "CPF", which is a type of personal ID every citizen have. So here is an example of a correctly formatted CPF number: 096.156.487-09 I'm trying to use a regular expression to format a string containing a CPF number, but I'm having a hard time at it. My current code is returning the

问题 I am given a list of numbers, for example [22,45,2,6,7,...] . Now I have to insert binary operators: + , - , / , * and parentheses ( , ) between numbers so that expression is equal to given number k . List all possible expressions created by insertions of operators and parentheses that will give sum of k . Position of numbers in resulting expression have to be fixed, i.e. only insertion of operators and parentheses between or around numbers For example : given number k=9 and list [1,2,3] ,

问题 I am given a list of numbers, for example [22,45,2,6,7,...] . Now I have to insert binary operators: + , - , / , * and parentheses ( , ) between numbers so that expression is equal to given number k . List all possible expressions created by insertions of operators and parentheses that will give sum of k . Position of numbers in resulting expression have to be fixed, i.e. only insertion of operators and parentheses between or around numbers For example : given number k=9 and list [1,2,3] ,