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Remove substring from the string
I am just wondering if there is any method to remove string from another string?
Something like this:
10 Answers
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Is there a better way to dynamically build an SQL WHERE clause than by using 1=1 at its beginning?
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Save the conditions in a list:
List<string> conditions = new List<string>();
if (condition1) conditions.Add("Col1=0");
//...
if (conditions.Any())
Query += " WHERE " + string.Join(" AND ", conditions.ToArray());
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How do you determine which backend is being used by matplotlib?
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Use the get_backend() function to obtain a string denoting which backend is in use:
>>> import matplotlib
>>> matplotlib.get_backend()
'TkAgg'
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How to split a string, but also keep the delimiters?
I have a multiline string which is delimited by a set of different delimiters:
23 Answers
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What's the simplest way to print a Java array?
In Java, arrays don't override toString() , so if you try to print one directly, you get the className + '@' + the hex of the hashCode of the array, as defined by Object.toString() :
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What is the MySQL JDBC driver connection string?
...tabase.
I am using Connector/J driver, but I cant find the JDBC connection string for my Class.forName() method.
11 Answe...
Downcasting in Java
...s a possibility that it succeeds at run time:
Object o = getSomeObject(),
String s = (String) o; // this is allowed because o could reference a String
In some cases this will not succeed:
Object o = new Object();
String s = (String) o; // this will fail at runtime, because o doesn't reference a ...
How do I use a PriorityQueue?
...Queue which is unbounded.
Here's an example of a priority queue sorting by string length:
// Test.java
import java.util.Comparator;
import java.util.PriorityQueue;
public class Test {
public static void main(String[] args) {
Comparator<String> comparator = new StringLengthComparat...
Convert hex string to int in Python
How do I convert a hex string to an int in Python?
12 Answers
12
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stl 字符串std::string作为std::map主键key的实例 - C/C++ - 清泛网 - 专注C/C++及内核技术
stl 字符串std::string作为std::map主键key的实例本文通过一个实例介绍std::map字符串作为key的常见用法，并使用find_if实现map按value值查找。代码如下：
#include <map>
#include <string>
#include <algorithm>
using namespace std;
class map_value_finder
{...