大约有 6,885 项符合查询结果（耗时：0.0231秒） [XML]
List of tables, db schema, dump etc using the Python sqlite3 API
...ql_query("SELECT * from table_name", db)
table.to_csv(table_name + '.csv', index_label='index')
Dump all tables:
import sqlite3
import pandas as pd
def to_csv():
db = sqlite3.connect('database.db')
cursor = db.cursor()
cursor.execute("SELECT name FROM sqlite_master WHERE type='table...
Most efficient way to determine if a Lua table is empty (contains no entries)?
...ility would be to count the number of elements, by using the metatable "newindex" key. When assigning something not nil, increment the counter (the counter could live in the metatable as well) and when assigning nil, decrement the counter.
Testing for empty table would be to test the counter with 0...
How to check which locks are held on a table
...partition id],
P.rows AS [partition/page rows],
AU.type_desc AS [index descr],
AU.container_id AS [index/page container_id]
FROM sys.dm_tran_locks AS TL
INNER JOIN sys.dm_os_waiting_tasks AS WT
ON TL.lock_owner_address = WT.resource_address
LEFT OUTER JOIN sys.objects AS O
ON O.ob...
Git command to show which specific files are ignored by .gitignore
...ivalent. The first show me 4 files, and the second only two. (.gitignore~, index.php~, sql/create_users.sql~, www/index.php~) (Would remove .gitignore~, Would remove index.php~). Am I missins something here?
– Cesar
Jun 15 '11 at 21:00
...
Animate text change in UILabel
...ue:String,duration: Double){
let characters = value.map { $0 }
var index = 0
Timer.scheduledTimer(withTimeInterval: duration, repeats: true, block: { [weak self] timer in
if index < value.count {
let char = characters[index]
self?.text! += "\(char)"
...
C# Iterate through Class properties
...
// the index of each item in fieldNames must correspond to
// the correct index in resultItems
var fieldnames = new []{"itemtype", "etc etc "};
for (int e = 0; e < fieldNames.Length - 1; e++)
{
newRecord
.GetType()
...
How to find all positions of the maximum value in a list?
...
a.index(max(a))
will tell you the index of the first instance of the largest valued element of list a.
share
|
improve this...
Find a value in an array of objects in Javascript [duplicate]
... something like:
let obj = array.find(x => x.name === 'string 1');
let index = array.indexOf(obj);
array.fill(obj.name='some new string', index, index++);
share
|
improve this answer
|...
How do I convert dates in a Pandas data frame to a 'date' data type?
...trying to be set on a copy of a slice from a DataFrame. Try using .loc[row_index,col_indexer] = value instead
– yoshiserry
Mar 14 '14 at 2:07
|
...
C dynamically growing array
...a "raw" list of in-game entities, and I intend to make an array holding an index number (int) of an indeterminate number of entities, for processing various things. I would like to avoid using too much memory or CPU for keeping such indexes...
...