ios - Updating core data performance -

-

i'm creating app uses core data store information web server. when there's internet connection, app check if there changes in entries , update them. now, i'm wondering best way go it. each entry in database has last updated timestamp. of these 2 more efficient:

  1. go through entries , check timestamp see entry needs updated.
  2. delete whole entity , re-download again.

sorry if seems obvious question , thanks!

i'd option 1 efficient, there case downloading (especially in large database large amounts of data) more efficient downloading parts need.


Comments

Post a Comment

Popular posts from this blog

c++ - Linked List error when inserting for the last time -

-
so have part of code here this loop 5 times (max = 5) insert word link list. for ( int = 0 ; < max ; i++ ) { string alphabet = g->returnalphabets(); l[i]->addwords(alphabet[i]); } and have insert word part here string line; fstream myfile ("words.txt"); while (!myfile.eof()) { getline(myfile,line); if ( alphabet == line[0] ) { listnode *newnode = new listnode; if ( head == null ) { newnode->item = alphabet; newnode->next = null; head = newnode; } else { newnode->item = line; prev = cur; prev->next = newnode; } cur = newnode; } } myfile.close(); my problem gives me error on last loop. meaning on max = 4, insert node. rest of loop fine. when decrease max 4 meaning loop 4 times, program error-free when program loops 5 times gives error. anyone can poin...
Read more

java - activate/deactivate sonar maven plugin by profile? -

-
i use sonar plugin executes if activated in maven profile. sonar runs on every compile. the problem build fail other team members not have sonar application installed locally. pom.xml checked in team members same copy including sonar configuration, don't want them modify purpose of disabling sonar (they might inadvertently check modified copy in). please advise how configure maven (.m2/settings.xml) and/or pom.xml sonar feature can enabled/disabled local profile. here sonar configuration in each project's pom.xml: <plugin> <groupid>org.codehaus.mojo</groupid> <artifactid>sonar-maven-plugin</artifactid> <version>1.0</version> <executions> <execution> <id>make-sonar</id> <phase>compile</phase> <goals> <goal>sonar</goal> </goals> </execution> </executions> ...
Read more

tsql - Pivot with Temp Table (definition for column must include data type) -- SQL Server 2008 -

-
the following returning 2 errors: 'the definition column '0.63' must include data type.' 'the select list insert statement contains fewer items insert list. number of select values must match number of insert columns.' i understand need assign data type columns being inserted temp table don't quite understand how dynamic code however. if explanation on how @cols variable code working , specific issue. fldpk data type int , pivot fields i.e. @cols, float data type. declare @cols nvarchar(max), @query nvarchar(max); select @cols = stuff((select distinct ',' + quotename(fldci) fn_qryt_1() xml path(''), type ).value('.', 'nvarchar(max)') ,1,1,'') set @query = 'select fldpk, ' + @cols + ' ( select fldpk ,fldni ...
Read more