大约有 44,000 项符合查询结果（耗时：0.0422秒） [XML]
Will Emacs make me a better programmer? [closed]
...s in pieces, in other postings of his. http://steve-yegge.blogspot.com/2008_04_01_archive.html is probably the most comprehensive, but the info is buried in there since it's on a tangent to the main subject.
I guess to summarize: the programmers who are merely good or competent will pick up an IDE ...
SHA-1 fingerprint of keystore certificate
...-keypass android
for Release mode:
keytool -list -v -keystore {keystore_name} -alias {alias_name}
example:
keytool -list -v -keystore C:\Users\MG\Desktop\test.jks -alias test
On windows, when keytool command is not found, Go to your installed JDK Directory e.g. <YourJDKPath>\Java\j...
Why does the 260 character path length limit exist in Windows?
...iscussed in the following paragraphs), the maximum length for a path is MAX_PATH, which is defined as 260 characters. A local path is structured in the following order: drive letter, colon, backslash, name components separated by backslashes, and a terminating null character. For example, the maximu...
Hidden Features of MySQL
...he SQL queries to guide MySQL to execute them faster.
Administration:
max_connections is the number of concurrent connections. The default value is 100 connections (151 since 5.0) - very small.
Note:
connections take memory and your OS might not be able to handle a lot of connections.
MySQL b...
How do you use variables in a simple PostgreSQL script?
...e (http://www.postgresql.org/docs/9.1/static/sql-do.html )
DO $$
DECLARE v_List TEXT;
BEGIN
v_List := 'foobar' ;
SELECT *
FROM dbo.PubLists
WHERE Name = v_List;
-- ...
END $$;
Also you can get the last insert id:
DO $$
DECLARE lastid bigint;
BEGIN
INSERT INTO test (name) VALUES ('...
Android getting value from selected radiobutton
...ndroidAppActivity.this,
radioButton.getText(), Toast.LENGTH_SHORT).show();
}
});
}
}
xml
<RadioGroup
android:id="@+id/radio"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<RadioButton
...
Fastest way to determine if an integer's square root is an integer
...04040 computed below
{
for (int i=0; i<64; ++i) goodMask |= Long.MIN_VALUE >>> (i*i);
}
public boolean isSquare(long x) {
// This tests if the 6 least significant bits are right.
// Moving the to be tested bit to the highest position saves us masking.
if (goodMask <&l...
Numpy: Get random set of rows from 2D array
...st, but this is what works best for me:
A[np.random.choice(A.shape[0], num_rows_2_sample, replace=False)]
change the replace=False to True to get the same thing, but with replacement.
share
|
im...
Cocoa Core Data efficient way to count entities
... = [NSEntityDescription entityForName:@"YourEntity" inManagedObjectContext:_managedObjectContext];
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
[fetchRequest setEntity:entity];
[fetchRequest setIncludesPropertyValues:NO];
[fetchRequest setIncludesSubentities:NO];
NSError *error = ni...
Change the Target Framework for all my projects in a Visual Studio Solution
...--------------------------------
' Copyright (C) 2007-2008 Scott Dorman (sj_dorman@hotmail.com)
'
' This library is free software; you can redistribute it and/or
' modify it under the terms of the Microsoft Public License (Ms-PL).
'
' This library is distributed in the hope that it will be useful,
'...