variables

问题 What is the proper way to concatenate text and a variable in PHP inside a mysql_query? Here is my attempt: page.'$pageID' I want it to output page3 . Here is all of the code (simplified to focus on the mysql_query): if ($_POST['pageProgress']) { $pageProgress = $_POST['pageProgress']; $pageID = 3; $userID = 1; $updateUserProgress = mysql_query("UPDATE test SET page.'$pageID'='$pageProgress' WHERE userID='$userID'") or die(mysql_error()); } All of the code works perfectly if I simply replace

问题 What is the proper way to concatenate text and a variable in PHP inside a mysql_query? Here is my attempt: page.'$pageID' I want it to output page3 . Here is all of the code (simplified to focus on the mysql_query): if ($_POST['pageProgress']) { $pageProgress = $_POST['pageProgress']; $pageID = 3; $userID = 1; $updateUserProgress = mysql_query("UPDATE test SET page.'$pageID'='$pageProgress' WHERE userID='$userID'") or die(mysql_error()); } All of the code works perfectly if I simply replace

问题 What is the proper syntax for referencing a different workbook's worksheet? The following code is throwing an error on the last line. Thanks! 'Instantiate Workbook variables Dim mWB As Workbook 'master workbook 'Instantiate Worksheet variables Dim mWS As Worksheet 'master worksheet 'Open Workbook, set variables and reference range Workbooks.Open ("Local 500GB HD:Users:user:Public:file.xlsx") Set mWB = ActiveWorkbook Set mWS = Sheets("Invoices") mWB.mWS.Range("A1").FormulaR1C1 = "Import Date"

问题 What is the proper syntax for referencing a different workbook's worksheet? The following code is throwing an error on the last line. Thanks! 'Instantiate Workbook variables Dim mWB As Workbook 'master workbook 'Instantiate Worksheet variables Dim mWS As Worksheet 'master worksheet 'Open Workbook, set variables and reference range Workbooks.Open ("Local 500GB HD:Users:user:Public:file.xlsx") Set mWB = ActiveWorkbook Set mWS = Sheets("Invoices") mWB.mWS.Range("A1").FormulaR1C1 = "Import Date"

问题 I have a class in Swift that I'm trying to write that has a variable of an array of objects. Is there a better way to write this? var myvar: Array<MyClass> = Array<MyClass>() Without the bit after the = sign, the compiler complains about my AppDelegate having no initializers. The above way seems a bit lengthy (though it's no more terse than the c# equivalent, I guess). I'd just like to know if there's a shortcut. Thanks. 回答1: You can initialize the variable with an empty array: var myvar:

问题 How do I obtain the non-local variables for the current scope? The functions vars , locals , and globals exist, but is there a function to get the nonlocals ? Why aren't the nonlocals listed when calling vars ? Update My issue is that there's no way to enumerate the variables available in the current scope, as neither vars or globals includes the non-locals AFAICT. I frequently use vars in code such as the following: '{meh[0]}/{meh[3]} {a}{b}{c}'.format(**vars()) Which fails if any of these

问题 How do I obtain the non-local variables for the current scope? The functions vars , locals , and globals exist, but is there a function to get the nonlocals ? Why aren't the nonlocals listed when calling vars ? Update My issue is that there's no way to enumerate the variables available in the current scope, as neither vars or globals includes the non-locals AFAICT. I frequently use vars in code such as the following: '{meh[0]}/{meh[3]} {a}{b}{c}'.format(**vars()) Which fails if any of these

问题 I can't figure this one out... Could someone please help me en explain how it works to? Goal: Adding a variable to a hard-coded URL, and put the new string into a href Example: var x = "1000"; var y = "http://www.google.com" var result = y + x; <a href="! the value of result !">click here...</a> Edit i'm sorry i meant y + x ofcourse... 回答1: Given this HTML code: <a href="" target="_blank">click here...</a> You would need this bit of js code: (working example http://jsfiddle.net/QUEZL) var x =

问题 I have service with variable and method that brings data to that variable export class UserService { userDetails; getUserProfile(){ return this.http.get(this.BaseURI+'/UserProfile').subscribe( res=>{ this.userDetails=res; // console.log(res); }, err=>{ console.log(err); } ); } now I want to check from component when the variable changes and read it. How can I do that ? UPDATE. export class UserService { userDetails; getUserProfile(){ this.http.get(this.BaseURI+'/UserProfile').subscribe( res=>

问题 I have service with variable and method that brings data to that variable export class UserService { userDetails; getUserProfile(){ return this.http.get(this.BaseURI+'/UserProfile').subscribe( res=>{ this.userDetails=res; // console.log(res); }, err=>{ console.log(err); } ); } now I want to check from component when the variable changes and read it. How can I do that ? UPDATE. export class UserService { userDetails; getUserProfile(){ this.http.get(this.BaseURI+'/UserProfile').subscribe( res=>