zerofill

Adding zerofill to existing table

由 徘徊边缘 提交于 2020-01-13 06:02:25
问题 I'm trying to add ZEROFILL to an auto-incremented primary ID field in a MySQL database. Here is the code (auto-generated by MySQL Workbench): ALTER TABLE `database`.`table` CHANGE COLUMN `id` `id` INT(11) ZEROFILL NOT NULL AUTO_INCREMENT This is the error I get: Error Code: 1025. Error on rename of './database/#sql-2c8_cb' to './database/table' (errno: 150) It appears that a temp table has been created and when the error occurs when the temp table is renamed with the original table name. Any

Adding zerofill to existing table

由 拟墨画扇 提交于 2020-01-13 06:02:05
问题 I'm trying to add ZEROFILL to an auto-incremented primary ID field in a MySQL database. Here is the code (auto-generated by MySQL Workbench): ALTER TABLE `database`.`table` CHANGE COLUMN `id` `id` INT(11) ZEROFILL NOT NULL AUTO_INCREMENT This is the error I get: Error Code: 1025. Error on rename of './database/#sql-2c8_cb' to './database/table' (errno: 150) It appears that a temp table has been created and when the error occurs when the temp table is renamed with the original table name. Any

Save blank file in Objective-C

由 ╄→гoц情女王★ 提交于 2019-12-24 01:53:50
问题 I am working on a code that, among other things, must save a zero-filled file. It can expect to create a file from 10MB to even 1GB blank. It must be similar to this Unix command: dd if=/dev/zero of=my_image.dsk count=20480 I could do this one work with small sizes: int totalSize = 1024*1024; char buf[totalSize]; strcpy(buf,""); NSData *theData = [NSData dataWithBytes:buf length:sizeof(buf)]; //NSLog(@"%@", theData); NSLog(@"%lu", sizeof(buf)); [theData writeToFile:@"/Users/foo/Desktop/my

PHP equivalent javascript >>> shift right with zero fill bitwise operators?

由 我的梦境 提交于 2019-12-19 09:18:17
问题 May I know how can I do PHP >>> ? Such operators is not available in PHP, but is available in Javascript. I just managed to discover a function as follow: function zeroFill($a, $b) { $z = hexdec(80000000); if ($z & $a) { $a = ($a>>1); $a &= (~$z); $a |= 0x40000000; $a = ($a>>($b-1)); } else { $a = ($a>>$b); } return $a; } but unfortunately, it doesn't work perfectly. EG: -1149025787 >>> 0 Javascript returns 3145941509 PHP zeroFill() return 0 回答1: /** * The >>> javascript operator in php x86

PHP & MySQL: zerofill is lost when using mysqli->prepare()

由 故事扮演 提交于 2019-12-14 03:23:00
问题 Using: MySQL 5.1 + PHP 5.3.5 MySQL: id in "table" is defined as: mediumint(6) zerofill not null I get the expected result when using: $mysqli->query("SELECT id FROM table WHERE id = 1"); while($row = $ret->fetch_array(MYSQLI_ASSOC)) $arr[] = $row; >>> $arr[0]["id"] = 000001 But not when I use prepared statement: $ret = $mysqli->prepare("SELECT id FROM table WHERE id = ?"); call_user_func_array(array($ret,"bind_param"),array("i",1)); $ret->execute(); $ret->store_result(); $meta = $ret->result

How do I use sprintf to zero fill to a variable length in Perl?

由 坚强是说给别人听的谎言 提交于 2019-12-06 06:49:47
问题 I want to use Perl's sprintf to zerofill a variable. sprintf("%08d", $var); But I want to dynamically determine how many digits to zerofill. How do I replace the "8" in sprintf("%08d", $var) with a variable called $zerofill ? 回答1: The first argument to sprintf is just a string: my $zerofill = 9; my $number = 1000; my $filled = sprintf "%0${zerofill}d", $number; Notice the braces to set apart the variable name from the rest of the string. We have this particular problem as a slightly clever

Adding zerofill to existing table

由 梦想的初衷 提交于 2019-12-04 16:51:01
I'm trying to add ZEROFILL to an auto-incremented primary ID field in a MySQL database. Here is the code (auto-generated by MySQL Workbench): ALTER TABLE `database`.`table` CHANGE COLUMN `id` `id` INT(11) ZEROFILL NOT NULL AUTO_INCREMENT This is the error I get: Error Code: 1025. Error on rename of './database/#sql-2c8_cb' to './database/table' (errno: 150) It appears that a temp table has been created and when the error occurs when the temp table is renamed with the original table name. Any help would be great! If using InnoDB, check the status monitor (SHOW ENGINE INNODB STATUS) right after

How do I use sprintf to zero fill to a variable length in Perl?

由 删除回忆录丶 提交于 2019-12-04 10:07:27
I want to use Perl's sprintf to zerofill a variable. sprintf("%08d", $var); But I want to dynamically determine how many digits to zerofill. How do I replace the "8" in sprintf("%08d", $var) with a variable called $zerofill ? brian d foy The first argument to sprintf is just a string: my $zerofill = 9; my $number = 1000; my $filled = sprintf "%0${zerofill}d", $number; Notice the braces to set apart the variable name from the rest of the string. We have this particular problem as a slightly clever exercise in Learning Perl to remind people that strings are just strings. :) However, as mobrule

PHP equivalent javascript >>> shift right with zero fill bitwise operators?

由 不想你离开。 提交于 2019-12-01 06:20:49
May I know how can I do PHP >>> ? Such operators is not available in PHP, but is available in Javascript. I just managed to discover a function as follow: function zeroFill($a, $b) { $z = hexdec(80000000); if ($z & $a) { $a = ($a>>1); $a &= (~$z); $a |= 0x40000000; $a = ($a>>($b-1)); } else { $a = ($a>>$b); } return $a; } but unfortunately, it doesn't work perfectly. EG: -1149025787 >>> 0 Javascript returns 3145941509 PHP zeroFill() return 0 /** * The >>> javascript operator in php x86_64 * Usage: -1149025787 >>> 0 ---> rrr(-1149025787, 0) === 3145941509 * @param int $v * @param int $n *

How can I pad a value with leading zeros?

由 雨燕双飞 提交于 2019-11-25 21:38:47
问题 What is the recommended way to zerofill a value in JavaScript? I imagine I could build a custom function to pad zeros on to a typecasted value, but I\'m wondering if there is a more direct way to do this? Note: By \"zerofilled\" I mean it in the database sense of the word (where a 6-digit zerofilled representation of the number 5 would be \"000005\"). 回答1: Note to readers! As commenters have pointed out, this solution is "clever", and as clever solutions often are, it's memory intensive and
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