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Why does ++[[]][+[]]+[+[]] return the string “10”?
This is valid and returns the string "10" in JavaScript ( more examples here ):
9 Answers
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Format numbers to strings in Python
I need to find out how to format numbers as strings. My code is here:
8 Answers
8
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How to check if PHP array is associative or sequential?
...y but has no element in 0 position. As "most" real associative arrays have strings as keys this should be a nice optimisation for the general case of such function.
– OderWat
May 24 '17 at 23:57
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Is it possible to have multiple styles inside a TextView?
...rhaps one way of doing this is through a stub method, say, formatTextWhite(string text) that just inserts the text into the following format string: "<font size="..." color="..." face="...">%s</font>".
– Legend
Aug 11 '12 at 0:03
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AsyncTask Android example
... }
private final class LongOperation extends AsyncTask<Void, Void, String> {
@Override
protected String doInBackground(Void... params) {
for (int i = 0; i < 5; i++) {
try {
Thread.sleep(1000);
} catch (Int...
Java: How to get input from System.console()
...ut (usable only outside of an IDE):
System.out.print("Enter something:");
String input = System.console().readLine();
Another way (works everywhere):
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Test {
public static void main(St...
Check if a Python list item contains a string inside another string
...
If you only want to check for the presence of abc in any string in the list, you could try
some_list = ['abc-123', 'def-456', 'ghi-789', 'abc-456']
if any("abc" in s for s in some_list):
# whatever
If you really want to get all the items containing abc, use
matching = [s fo...
How can I count occurrences with groupBy?
...il.*;
import java.util.stream.*;
class Test {
public static void main(String[] args) {
List<String> list = new ArrayList<>();
list.add("Hello");
list.add("Hello");
list.add("World");
Map<String, Long> counted = list.stream()
...
iOS app, programmatically get build version
...:
Swift 3
let version = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as! String
ObjC
NSString *version = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"];
Swift 2
let version = NSBundle.mainBundle().infoDictionary?["CFBundleShortVersionString"]...
Swift 编程语言入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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let label = "The width is "
let width = 94
let widthLabel = label + String(width)
Note
练习
尝试删除最后一行的String转换，你会得到什么错误？
还有更简单的方法来在字符串中包含值：以小括号来写值，并用反斜线("")放在小括号之前...