variable-names

问题 A common variable name for files or directories is "path". Unfortunately that is also the name of a package in Go. Besides, changing path as a argument name in DoIt, how do I get this code to compile? package main import ( "path" "os" ) func main() { DoIt("file.txt") } func DoIt(path string) { path.Join(os.TempDir(), path) } The error I get is: $6g pathvar.go pathvar.go:4: imported and not used: path pathvar.go:13: path.Join undefined (type string has no field or method Join) 回答1: The path

问题 I've seen this question asked before but I can't seem to get the grasp of it. I have this variable that I get from user input read column_number and then I join it with the "col" prefix to form the name of my variable selected_column="col"$column_number But when I try to evaluate it to get the result, I keep getting the (standard_in) 1: syntax error sum=$(round $sum+"echo ${!selected_column}", 2) full code: 回答1: column_number=5 selected_column=col$column_number col5=42 sum=17 echo $(($sum+${

问题 I'm trying to read from Bash variables for which I know name suffixes, but I want to iterate through the prefixes. I give an example below: var1_name="variable1" var1_size="2" var2_name="variable2" var2_size="3" vars=(var1 var2) for v in "${vars[@]}" do echo $v_name echo $v_size done and I'd want the output to look like follows: variable1 2 variable2 3 Is there any to do this with Bash? I have tried with eval and associative arrays, but I still can't find a way to examine an already defined

问题 Thanks ahead of time, to anyone who helps. :) This may seem a simple answer to those who are experienced, but I have scoured the internet as well as a couple of reference books, and not found a straight forward answer to this question, so hopefully it may be of help to others as well. I'm currently transitioning from Actionscript to Typescript, and have a reasonable amount of experience with vanilla Javascript, so to put it simply in Javascript terms, if I wanted to dynamically reference a

问题 Thanks ahead of time, to anyone who helps. :) This may seem a simple answer to those who are experienced, but I have scoured the internet as well as a couple of reference books, and not found a straight forward answer to this question, so hopefully it may be of help to others as well. I'm currently transitioning from Actionscript to Typescript, and have a reasonable amount of experience with vanilla Javascript, so to put it simply in Javascript terms, if I wanted to dynamically reference a

问题 Thanks ahead of time, to anyone who helps. :) This may seem a simple answer to those who are experienced, but I have scoured the internet as well as a couple of reference books, and not found a straight forward answer to this question, so hopefully it may be of help to others as well. I'm currently transitioning from Actionscript to Typescript, and have a reasonable amount of experience with vanilla Javascript, so to put it simply in Javascript terms, if I wanted to dynamically reference a

问题 Thanks ahead of time, to anyone who helps. :) This may seem a simple answer to those who are experienced, but I have scoured the internet as well as a couple of reference books, and not found a straight forward answer to this question, so hopefully it may be of help to others as well. I'm currently transitioning from Actionscript to Typescript, and have a reasonable amount of experience with vanilla Javascript, so to put it simply in Javascript terms, if I wanted to dynamically reference a

问题 Is bash shell scripting case sensitive? Is variable date the same as DATE ? 回答1: Yes, it is case sensitive, just like the rest of UNIX. $date and $DATE are two different variables. makefile and Makefile are two different files. -h and -H are two distinct flags (usually). 来源： https://stackoverflow.com/questions/15571706/bash-variables-case-sensitive-or-not

问题 Is bash shell scripting case sensitive? Is variable date the same as DATE ? 回答1: Yes, it is case sensitive, just like the rest of UNIX. $date and $DATE are two different variables. makefile and Makefile are two different files. -h and -H are two distinct flags (usually). 来源： https://stackoverflow.com/questions/15571706/bash-variables-case-sensitive-or-not

问题 I know this was asked a lot but I can not work with/understand the answers so far. I want to change the suffix of variables in a for loop. I tried all answers the stackoverflow search provides. But it is difficult to understand specific codes the questioner often presents. So for clarification I use an easy example. This is not meant as application-oriented. I just want to understand how I can change the suffix. var_1 = 10 var_2 = 100 var_3 = 1000 for i in range(1,4): test_i = var_i + 1 print