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How to read json file into java with simple JSON library
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You can use jackson library and simply use these 3 lines to convert your json file to Java Object.
ObjectMapper mapper = new ObjectMapper();
InputStream is = Test.class.getResourceAsStream("/test.json");
testObj = mapper.readValue(is, Test.class);
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Hashing a file in Python
...pisti points out, we gotta deal with those bigger files in chunks!
import sys
import hashlib
# BUF_SIZE is totally arbitrary, change for your app!
BUF_SIZE = 65536 # lets read stuff in 64kb chunks!
md5 = hashlib.md5()
sha1 = hashlib.sha1()
with open(sys.argv[1], 'rb') as f:
while True:
...
How do I calculate tables size in Oracle
..._rows*avg_row_len)/(1024*1024)) MB
from all_tables
where owner not like 'SYS%' -- Exclude system tables.
and num_rows > 0 -- Ignore empty Tables.
order by MB desc -- Biggest first.
;
--Tables + Rows
select owner, table_name, num_rows
from all_tables
where owner not like 'SYS%' -- Exclude...
Check if OneToOneField is None in Django
...on 3.4, Django 1.9.2, and SQLite3 3.8.2.
# Tested with Django 1.9.2
import sys
import django
from django.apps import apps
from django.apps.config import AppConfig
from django.conf import settings
from django.core.exceptions import ObjectDoesNotExist
from django.db import connections, models, DEFAUL...
tcp加速技术解决方案 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
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RPS就会选择特定的cpu做协议栈处理， 映射关系可以通过/sys/class/net//queues/rx-/rps_cpus来配置。 但是RPS并不清楚应用程序在哪个cpu上。
RFS（Receive Flow Steering）：RFS是在RPS的基础上， 解决了RPS的问题。 当应用程序调用recvmsg的时候...
How do I print the type or class of a variable in Swift?
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As of Xcode 6.3 with Swift 1.2, you can simply convert type values into the full demangled String.
toString(Int) // "Swift.Int"
toString(Int.Type) // "Swift.Int.Type"
toString((10).dynamicType) // "Swift.Int"
println(Bool.self) ...
How to remove leading zeros using C#
... how long the NVARCHAR is, as a few of the above (especially the ones that convert through IntXX) methods will not work for:
String s = "005780327584329067506780657065786378061754654532164953264952469215462934562914562194562149516249516294563219437859043758430587066748932647329814687194673219673294...
Get Android API level of phone currently running my application [duplicate]
...ll have to use android.os.Build.VERSION.SDK, which is a String that can be converted to the integer of the release.
If you are on at least API version 4 (Android 1.6 Donut), the current suggested way of getting the API level would be to check the value of android.os.Build.VERSION.SDK_INT, which is ...
How to get a enum value from string in C#?
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This code snippet illustrates obtaining an enum value from a string. To convert from a string, you need to use the static Enum.Parse() method, which takes 3 parameters. The first is the type of enum you want to consider. The syntax is the keyword typeof() followed by the name of the enum class in...
UPDATE multiple tables in MySQL using LEFT JOIN
... @colsUpd = STUF ((SELECT DISTINCT '], T1.[' + name,']=T2.['+name+'' FROM sys.columns
WHERE object_id = (
SELECT top 1 object_id
FROM sys.objects
WHERE name = ''+@TableNa...