I have a piece of shtml to amend:
#foreach (Dictionary.DictionaryItem item in countriesParentNode.Children.OrderBy(d => d.Value(languageId)))
{
string itmval = #item.Value(languageId);
bool empty = #itmval == "";
<option value="#item.key.ToString().Replace(rootKeyToReplace, "")">#item.Value(languageId) #empty</option>
}
I need to display < option... > bit only if value is not empty (bool empty is false).
I tried
if (notEmpty) {}
#if (notEmpty) {}
if (#notEmpty) {}
#if (#notEmpty) {}
All return errors. How to do it then?
I cannot find out anywhere any example, only some SSI include examples
Related
I am getting an error that I am having problems fixing as recursion hasn't "sunk in" yet.
It is supposed to go through an array of symbols already placed by the Class OrderManager Object and check if the symbol passed in is already there or not, if it is not there it should allow the trade, otherwise it will block it (multiple orders on the same currency compounds risk)
[Error] '}' - not all control paths return a value.
I believe it is because of the retest portion not having a return value but again I'm still newish to making my own recursive functions. However it may also be because my base and test cases are wrong possibly?
P.S I added (SE) comments in places to clarify language specific things since it is so close to C++.
P.P.S Due to the compiler error, I have no clue if this meets MVRC. Sorry everyone.
bool OrderManager::Check_Risk(const string symbol, uint iter = 0) {
if((iter + 1) != ArraySize(m_symbols) &&
m_trade_restrict != LEVEL_LOW) // Index is one less than Size (SE if
// m_trade_restrict is set to LOW, it
// allows all trades so just break out)
{
if(OrderSelect(OrderManager::Get(m_orders[iter]),
SELECT_BY_TICKET)) // Check the current iterator position
// order (SE OrderSelect() sets an
// external variable in the terminal,
// sort of like an environment var)
{
string t_base = SymbolInfoString(
OrderSymbol(),
SYMBOL_CURRENCY_BASE); // Test base (SE function pulls apart
// the Symbol into two strings
// representing the currency to check
// against)
string t_profit =
SymbolInfoString(OrderSymbol(), SYMBOL_CURRENCY_PROFIT);
string c_base =
SymbolInfoString(symbol, SYMBOL_CURRENCY_BASE); // Current base
// (SE does the same as above but for the passed variable instead):
string c_profit = SymbolInfoString(symbol, SYMBOL_CURRENCY_PROFIT);
// Uses ENUM_LEVELS from Helpers.mqh (SE ENUM of 5 levels: Strict,
// High, Normal, Low, None in that order):
switch(m_trade_restrict) {
case LEVEL_STRICT: {
if(t_base == c_base || t_profit == c_profit) {
return false; // Restrictions won't allow doubling
// orders on any currency
} else
return Check_Risk(symbol, iter++);
};
case LEVEL_NORMAL: {
if(symbol == OrderSymbol()) {
return false; // Restrictions won't allow doubling
// orders on that curr pair
} else
return Check_Risk(symbol, iter++);
};
default: {
// TODO: Logging Manager
// Hardcoded constant global (SE set to LEVEL_NORMAL):
ENB_Trade_Restrictions(default_level);
return Check_Risk(symbol, iter);
}
}
}
} else {
return true;
}
}
So, I must just have been staring at the code for too long but the problem was the if(OrderSelect(...)) on ln 7 did not have a return case if the order was not properly set in the terminal. I will need to polish this but the following code removes the error.
bool OrderManager::Check_Risk(const string symbol, uint iter=0)
{
if((iter + 1) != ArraySize(m_symbols) && m_trade_restrict != LEVEL_LOW) // Index is one less than Size
{
if(OrderSelect(OrderManager::Get(m_orders[iter]), SELECT_BY_TICKET)) //Check the current iterator position order
{
string t_base = SymbolInfoString(OrderSymbol(), SYMBOL_CURRENCY_BASE); //Test base
string t_profit = SymbolInfoString(OrderSymbol(), SYMBOL_CURRENCY_PROFIT);
string c_base = SymbolInfoString(symbol, SYMBOL_CURRENCY_BASE); //Current base
string c_profit = SymbolInfoString(symbol, SYMBOL_CURRENCY_PROFIT);
switch(m_trade_restrict) // Uses ENUM_LEVELS from Helpers.mqh
{
case LEVEL_STRICT :
{
if(t_base == c_base || t_profit == c_profit)
{
return false;
}
else return Check_Risk(symbol, ++iter);
};
case LEVEL_NORMAL :
{
if(symbol == OrderSymbol())
{
return false;
}
else return Check_Risk(symbol, ++iter);
};
default: {
// TODO: Logging Messages
ENB_Trade_Restrictions(default_level); //Hardcoded constant global
return Check_Risk(symbol, iter);
}
}
}
else {return Check_Risk(symbol, ++iter);}
}
else {return true;}
}
I'd like to valid a string to check if the string just includes valid characters or not using C++.
Valid characters should be given to the function like as charset of valid characters: "abc123".
A string that just includes the characters given in the charset above should return true while a string that also includes other characters then given should return false. Obviously a easy task :)
--> using charset abc123:
string myString_1 = "bbbac1" // should get true
string myString_2 = "bbbac132aacc" // should get true
string myString_3 = "xxxxxx" // should get false
string myString_4 = "bbbac12533cc" // should get false
How can I implement a call like this in C++?
Note: I though about using something like the code below but I'm pretty sure theres a way better solution.
string charset = "abc123";
string myString = "bbbac1";
for (int i=0; i<charset.length(); i++) {
std::replace( myString.begin(), myString.end(), charset[i], '');
}
bool isValid = (myString.length() == 0);
AS igor-tandetnik pointed in comments this is a job for std::find_first_not_of:
auto validate(const std::string& str, const std::string& charset) -> bool
{
return str.find_first_not_of(charset) == std::string::npos;
}
You can write your own check function:
bool checkstring(std::string &checkstring, std::string &legalchars) {
for (char c : checkstring) {
// resetting the bool
bool isLegal = false;
for (char d : legalchars) {
// comparing the chars
if (c == d) { isLegal = true; }
}
// if a non-legal char was found, return false
if (!isLegal) { return false; }
}
// if no non-legal character was found, return true
return true;
}
Although there might be a better alternative using the standard libraries, especially if you need to compare very long strings with a large set of legal characters.
How to get code as string between {} of arrow function ?
var myFn=(arg1,..,argN)=>{
/**
*Want to parse
* ONLY which is between { and }
* of arrow function
*/
};
If it is easy to parse body of simple function : myFn.toString().match(/function[^{]+\{([\s\S]*)\}$/)[1]; is enough . However, Arrow function does not contains function keyword in its definition .
I came looking for a solution because I didn't feel like writing one, but I wasn't sold on the accepted answer. For anyone interested in an ES6 1-liner, I wrote this method, which handles all the cases I needed - both normal functions and arrow functions.
const getFunctionBody = method => method.toString().replace(/^\W*(function[^{]+\{([\s\S]*)\}|[^=]+=>[^{]*\{([\s\S]*)\}|[^=]+=>(.+))/i, '$2$3$4');
This is my attempt:
function getArrowFunctionBody(f) {
const matches = f.toString().match(/^(?:\s*\(?(?:\s*\w*\s*,?\s*)*\)?\s*?=>\s*){?([\s\S]*)}?$/);
if (!matches) {
return null;
}
const firstPass = matches[1];
// Needed because the RegExp doesn't handle the last '}'.
const secondPass =
(firstPass.match(/{/g) || []).length === (firstPass.match(/}/g) || []).length - 1 ?
firstPass.slice(0, firstPass.lastIndexOf('}')) :
firstPass
return secondPass;
}
const K = (x) => (y) => x;
const I = (x) => (x);
const V = (x) => (y) => (z) => z(x)(y);
const f = (a, b) => {
const c = a + b;
return c;
};
const empty = () => { return undefined; };
console.log(getArrowFunctionBody(K));
console.log(getArrowFunctionBody(I));
console.log(getArrowFunctionBody(V));
console.log(getArrowFunctionBody(f));
console.log(getArrowFunctionBody(empty));
It's probably more verbose than it needs to be because I tried to be generous about white space. Also, I'd be glad to hear if anyone knows how to skip the second pass. Finally, I decided not to do any trimming, leaving that to the caller.
Currently only handles simple function parameters. You'll also need a browser that natively supports arrow functions.
I want to create a dropdown menu With English or German as the options in Javascript / jQuery that checks that:
check if on a domain - say happy.com/pizza
if german is selected on dropdown
redirect user to
happy.de/pizza
and I could have a list
if happy.com/pizza got to happy.de/pizza
happy.com/coke got to happy.de/coke
happy.com/juice got to happy.de/juice
etc etc.
I have written the code yet but how would one go about this?
Thanks!
I have written some code but I just need a little help please:
In this scenario I am on the www.something.com/beer page and want it to go to the German Beer Page!
<select>
<option value="1">English</option>
<option value="2">German</option>
</select>
if(value == 2) && is current domain www.something.com/beer{
window.top.location.href = 'www.something.de/beer';
}else if(value == 2) && is current domain www.something.com/cheese{
window.top.location.href = 'www.something.de/cheese';
}else{
do nothing
}
How do I get this to check the value of the dropdown and the domain is currently on?
Here is my Jsfiddle
http://jsfiddle.net/msasz2an/
Thanks again!
function current(arr) {
// discuss at: http://phpjs.org/functions/current/
// original by: Brett Zamir (http://brett-zamir.me)
// note: Uses global: php_js to store the array pointer
// example 1: transport = ['foot', 'bike', 'car', 'plane'];
// example 1: current(transport);
// returns 1: 'foot'
this.php_js = this.php_js || {};
this.php_js.pointers = this.php_js.pointers || [];
var indexOf = function (value) {
for (var i = 0, length = this.length; i < length; i++) {
if (this[i] === value) {
return i;
}
}
return -1;
};
// END REDUNDANT
var pointers = this.php_js.pointers;
if (!pointers.indexOf) {
pointers.indexOf = indexOf;
}
if (pointers.indexOf(arr) === -1) {
pointers.push(arr, 0);
}
var arrpos = pointers.indexOf(arr);
var cursor = pointers[arrpos + 1];
if (Object.prototype.toString.call(arr) === '[object Array]') {
return arr[cursor] || false;
}
var ct = 0;
for (var k in arr) {
if (ct === cursor) {
return arr[k];
}
ct++;
}
// Empty
return false;
}
I am writing a function as follows:
bool abc::GetLoggingStatus() {
//true or false is returned
int value;
if (regKey->HasValue("LoggingStatus")) {
regKey->QueryValue("LoggingStatus", &value);
if (value == 1)
return true; //no logging possible
else
return false;
}
regKey->SetValue("LoggingStatus", 1);
return true;
}
Logging level is defined as:
typedef enum {
Entry,
Exit,
Debug,
Warning,
Notification,
Error
} TYPE;
What I need if I select 1 the levels for logging must be shown namely debug,error ... In regedit and if 0 nothing should be shown and logging be disabled.
You can't create dropdown menus in regedit, but what you can do is create a new entry called LoggingLevel. This entry is ignored if LoggingStatus is 0. LoggingLevel is a string defining the level.
If you want to convert this string back to an enum, the easiest way is to create a map from string to your Enum type:
std::map<std::string, TYPE> typeMap;
typeMap["Warning"] = Warning;
...
In your code you query the logging level:
char* level;
regKey->QueryValue("LoggingLevel", level);
TYPE theLevel = typeMap[level];
Of course you need to do appropriate error checking.
edit
You should add two function to get the log settings, shouldLog() and getLevel().
The log function would then look like:
void log(Logger* logger, TYPE type, string sClassName, string sMethodName, string sMessage = "") {
if (!logger || !abc::shouldLog()) {
return;
}
TYPE curLevel = abc::getLevel();
bool shouldLog = false;
if (type == Warning && (curLevel == All || curLevel == Warning) ...) {
shouldLog = true;
}
if (shouldLog) {logger->WriteEntry(sClassName, sMethodName); }
}
If you want to avoid complicated if-structures, you could also try and map the enums to a value and compare that. For example Warning = 1 and ALL = 0. Then you can check if curLevel < type to see if the logger should log.