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What does `:_*` (colon underscore star) do in Scala?
... Is there a limit to how long the sequence can be, such as there is with Java varargs?
– qwwqwwq
May 3 '17 at 4:52
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What is the meaning of id?
...r what class does it have.
id is the final super type of all objects.
In java or c# we use like this
Object data = someValue;
String name =(Object)data;
but in objective c
id data= someValue;
NSString *name= data;
...
How to decide font color in white or black depending on background color?
...
How about this (JavaScript code)?
/**
* Get color (black/white) depending on bgColor so it would be clearly seen.
* @param bgColor
* @returns {string}
*/
getColorByBgColor(bgColor) {
if (!bgColor) { return ''; }
return (parseInt...
Is there a way to do method overloading in TypeScript?
...it's mostly because the closest you can get to method overloading in plain JavaScript includes that checking too and TypeScript tries to not modify actual method bodies to avoid any unnecessary runtime performance cost.
If I understand it correctly, you have to first write a method declaration for ...
JSON left out Infinity and NaN; JSON status in ECMAScript?
Any idea why JSON left out NaN and +/- Infinity? It puts Javascript in the strange situation where objects that would otherwise be serializable, are not, if they contain NaN or +/- infinity values.
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Hibernate problem - “Use of @OneToMany or @ManyToMany targeting an unmapped class”
...ons look fine. Here are the things to check:
make sure the annotation is javax.persistence.Entity, and not org.hibernate.annotations.Entity. The former makes the entity detectable. The latter is just an addition.
if you are manually listing your entities (in persistence.xml, in hibernate.cfg.xml, ...
In C#, should I use string.Empty or String.Empty or “” to intitialize a string?
...his is just a carry-over from using StringUtils.EMPTY in commons.lang from java. One point of interest is I'm almost blind and this definately does help with readability for me.
– Brett Ryan
Sep 11 '09 at 4:34
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How to add a button to PreferenceScreen
...erencesFromResource(R.xml.pref_main);
}
}
}
SettingActivity.java
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Fr...
No appenders could be found for logger(log4j)?
...tion on the classpath (usually the same as the jar files).
Optionally set java option: -Dlog4j.configuration=file:///path/to/log4j.properties.
log4j uses Thread.getContextClassLoader().getResource() to locate the default configuration files and does not directly check the file system. Knowing t...
Download file from web in Python 3
I am creating a program that will download a .jar (java) file from a web server, by reading the URL that is specified in the .jad file of the same game/application. I'm using Python 3.2.1
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