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When and why should I use a namedtuple instead of a dictionary? [duplicate]
...don't have keys, so hashability isn't an issue.
However, they have a more stringent restriction -- their key-equivalents, "field names", have to be strings.
Basically, if you were going to create a bunch of instances of a class like:
class Container:
def __init__(self, name, date, foo, bar):
...
How to get current working directory in Java?
... .class file is in.
public class Test
{
public static void main(final String[] args)
{
final String dir = System.getProperty("user.dir");
System.out.println("current dir = " + dir);
}
}
if you are in /User/me/ and your .jar file containing the above code is in /opt/s...
HtmlSpecialChars equivalent in Javascript?
...
};
})()
Note: Only run this once. And don't run it on already encoded strings e.g. & becomes &
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Android requires compiler compliance level 5.0 or 6.0. Found '1.7' instead. Please use Android Tools
...ve a 64-bit OS? Do I need any of the features of 64-bit JDK? Are there any extra features in the 64-bit JDK?! Why won't this s*** play nice together!? F*** it I'm going 32-bit.
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Microbit LED 矩阵 · App Inventor 2 中文网
...的字符串将导致消息被截断。
Parameters:
+ LED_Text_Value (_string_) — 要写入的文本。字符串的长度限制为 20 个 UTF-8 八位字节。
WriteScrollingDelay – 设置 micro:bit LED 矩阵上显示字符之间的延迟时间，以毫秒为单位。写入该值...
ASP.NET MS11-100: how can I change the limit on the maximum number of posted form values?
...s calling ThrowIfMaxHttpCollectionKeysExceeded().
public HttpCookie Get(string name)
{
HttpCookie cookie = (HttpCookie) base.BaseGet(name);
if ((cookie == null) && (this._response != null))
{
cookie = new HttpCookie(name);
this.AddCookie(cookie, true);
...
error: passing xxx as 'this' argument of xxx discards qualifiers
...simple: make the functions const as:
int getId() const {
return id;
}
string getName() const {
return name;
}
This is necessary because now you can call getId() and getName() on const objects as:
void f(const StudentT & s)
{
cout << s.getId(); //now okay, but error with ...
Multiple DB Contexts in the Same DB and Application in EF 6 and Code First Migrations
...
Do I have to have a separate connection string for each context or is there a way around that?
– Lrayh
Feb 4 '14 at 15:20
3
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Visibility of global variables in imported modules
...l = None
if 'MYVAL' in os.environ:
myval = os.environ['MYVAL']
As an extra precaution, handle the case when MYVAL is not defined inside the module.
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C# DateTime.Now precision
... microsecond of each other, you have no idea which one occurred first. The extra precision is misleading garbage. If I had my way, all DateTimes would be rounded to the nearest second, as they were in VBScript.
– Eric Lippert
Jan 27 '10 at 16:52
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