137 lines
11 KiB
Markdown
137 lines
11 KiB
Markdown
# StringFind
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Search for a substring in a string.
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```
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int StringFind(
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string string_value, // string in which search is made
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string match_substring, // what is searched
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int start_pos=0 // from what position search starts
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);
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```
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Parameters
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string_value
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[in] String, in which search is made.
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match_substring
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[in] Searched substring.
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start_pos=0
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[in] Position in the string from which search is started.
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Return Value
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Returns position number in a string, from which the searched substring starts, or -1, if the substring is not found.
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Example:
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```
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#define RESERVE 100
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//+------------------------------------------------------------------+
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//| Script program start function |
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//+------------------------------------------------------------------+
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void OnStart()
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{
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//--- get the symbol base currency and the profit currency
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string symbol_currency_base =SymbolInfoString(Symbol(), SYMBOL_CURRENCY_BASE);
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string symbol_currency_profit=SymbolInfoString(Symbol(), SYMBOL_CURRENCY_PROFIT);
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PrintFormat("Symbol Currency Base: %s\nSymbol Currency Profit: %s", symbol_currency_base, symbol_currency_profit);
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//--- in the loop through all symbols available on the server
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int total=SymbolsTotal(false), pos=-1;
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for(int i=0; i<total; i++)
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{
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//--- get the name of the next symbol
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string name=SymbolName(i, false);
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//--- look for a substring in the symbol name with the name of the base currency and
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//--- if a substring is found, display the symbol name, its index in the currency list and the name of the searched currency in the log
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pos = StringFind(name, symbol_currency_base);
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if(pos >= 0)
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PrintFormat("The '%s' symbol at index %u in the list contains the '%s' currency. Substring position in the symbol name: %d", name, i, symbol_currency_base, pos);
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//--- look for a substring in the symbol name with the name of the quoted currency and
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//--- if a substring is found, display the symbol name, its index in the currency list and the name of the searched currency in the log
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pos = StringFind(name, symbol_currency_profit);
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if(pos >= 0)
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PrintFormat("The '%s' symbol at index %u in the list contains the '%s' currency. Substring position in the symbol name: %d", name, i, symbol_currency_profit, pos);
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}
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/*
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Result
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StringFind (EURUSD,D1) Symbol Currency Base: EUR
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StringFind (EURUSD,D1) Symbol Currency Profit: USD
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The 'EURUSD' symbol at index 0 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURUSD' symbol at index 0 in the list contains the 'USD' currency. Substring position in the symbol name: 3
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The 'GBPUSD' symbol at index 1 in the list contains the 'USD' currency. Substring position in the symbol name: 3
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The 'USDCHF' symbol at index 2 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDJPY' symbol at index 3 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDCNH' symbol at index 4 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDRUB' symbol at index 5 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'AUDUSD' symbol at index 6 in the list contains the 'USD' currency. Substring position in the symbol name: 3
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The 'NZDUSD' symbol at index 7 in the list contains the 'USD' currency. Substring position in the symbol name: 3
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The 'USDCAD' symbol at index 8 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDSEK' symbol at index 9 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDHKD' symbol at index 10 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDSGD' symbol at index 11 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDNOK' symbol at index 12 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDDKK' symbol at index 13 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDTRY' symbol at index 14 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDZAR' symbol at index 15 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDCZK' symbol at index 16 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDHUF' symbol at index 17 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDPLN' symbol at index 18 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDRUR' symbol at index 19 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'EURAUD' symbol at index 27 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURCAD' symbol at index 28 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURCHF' symbol at index 29 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURCZK' symbol at index 30 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURDKK' symbol at index 31 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURGBP' symbol at index 32 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURHKD' symbol at index 33 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURHUF' symbol at index 34 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURJPY' symbol at index 35 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURNOK' symbol at index 36 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURNZD' symbol at index 37 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURPLN' symbol at index 38 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURRUR' symbol at index 39 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURRUB' symbol at index 40 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURSEK' symbol at index 41 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURTRY' symbol at index 42 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURZAR' symbol at index 43 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'XAUUSD' symbol at index 47 in the list contains the 'USD' currency. Substring position in the symbol name: 3
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The 'XAUEUR' symbol at index 48 in the list contains the 'EUR' currency. Substring position in the symbol name: 3
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The 'XAGUSD' symbol at index 50 in the list contains the 'USD' currency. Substring position in the symbol name: 3
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The 'XAGEUR' symbol at index 51 in the list contains the 'EUR' currency. Substring position in the symbol name: 3
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The 'USDCRE' symbol at index 53 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'XPDUSD' symbol at index 65 in the list contains the 'USD' currency. Substring position in the symbol name: 3
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The 'XPTUSD' symbol at index 66 in the list contains the 'USD' currency. Substring position in the symbol name: 3
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The 'USDGEL' symbol at index 67 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDMXN' symbol at index 68 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'EURMXN' symbol at index 69 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'USDCOP' symbol at index 75 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDARS' symbol at index 76 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDCLP' symbol at index 77 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'EURSGD' symbol at index 89 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'USDILS' symbol at index 95 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDTHB' symbol at index 122 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'USDRMB' symbol at index 123 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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The 'EURILS' symbol at index 126 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'EURCNH' symbol at index 137 in the list contains the 'EUR' currency. Substring position in the symbol name: 0
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The 'USDBRL' symbol at index 139 in the list contains the 'USD' currency. Substring position in the symbol name: 0
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*/
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}
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```
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See also
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[StringSubstr](/en/docs/strings/stringsubstr), [StringGetCharacter](/en/docs/strings/stringgetcharacter), [StringLen](/en/docs/strings/stringlen), [StringLen](/en/docs/strings/stringlen)
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