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搜索关键字:exist    ( 3127个结果
ruby 删除文件
f = "app/assets/#{vm.uuid}.rrd" if FileTest::exist?(f) File.delete(f) end
分类:其他好文   时间:2014-11-10 01:04:45    阅读次数:225
httpClient如何接收格式错误的响应头部信息
Exception in thread "main" org.apache.commons.httpclient.ProtocolException: Unable to parse header: share memory not exist, need create new share memo...
分类:Web程序   时间:2014-11-08 18:08:59    阅读次数:457
LeetCode[string]: Length of Last Word
Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string. If the last word does not exist, return 0. Note: A word is defin...
分类:其他好文   时间:2014-11-06 14:57:52    阅读次数:150
Problem 006——Circular Sequence
Some DNA sequences exist in circular forms as in the following figure, which shows a circular sequence ``CGAGTCAGCT", that is, the last symbol ``T" in...
分类:其他好文   时间:2014-11-06 10:46:48    阅读次数:174
xcrun: error: active developer path ("/Users/apple/Desktop/Xcode5.app/Contents/Developer") does not exist, use xcode-select to change
一:情景:在mac下使用git;xcode4.6的环境时,需要安装command line tools ,但是在装了xcode5之后,就不需要安装command line tools了,默认已经集成了;但是我先装了,xcode4.6后来又安装了xcode5也就是,我mac上安装了两个版本的xocde...
分类:移动开发   时间:2014-10-30 16:46:01    阅读次数:194
Bad font rendering in Linux
Sometimes aliased/jagged fonts still exist after post-installation configuration. Following instructions may help to get them fixed to make characters...
分类:系统相关   时间:2014-10-30 01:38:11    阅读次数:211
LeetCode Length of Last Word
Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string. If the last word does not exist, return 0. Note: A word is defi...
分类:其他好文   时间:2014-10-27 14:26:12    阅读次数:249
git系列问题
最近xcode更新频繁,没有删除,偷懒就共存了两版本,删除了一下,导致git用不了~ xcrun: error: active developer path ("/Applications/Xcode 2.app/Contents/Developer") does not exist, use `xcode-select --...
分类:其他好文   时间:2014-10-26 21:25:44    阅读次数:212
Gentoo:startx出现Failed to load module问题
查看log: cat /var/log/Xorg.0.log | grep EE[ 75.403] (EE) Failed to load module "modesetting" (module does not exist, 0)[ 75.403] (EE) Failed to load module "fbdev" (module does not exist, 0)[...
分类:其他好文   时间:2014-10-24 11:07:22    阅读次数:259
SQL之 exists 、in
tips :  1.外表为大表,内表为小表时,使用exist  2.外表为小表,内表为大表时,使用in 示例:外表大,内表小 create table outTable (id1 int); insert into outtable select generate_series(1,1000000); create table inTable (id1 int); i...
分类:数据库   时间:2014-10-24 01:46:44    阅读次数:293
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