Giventwostrings S​1​​ and S​2​​, S=S​1​​−S​2​​ isdefinedtobetheremainingstringaftertakingallthecharactersin S​2​​ from&...

Evaistryingtomakeherowncolorstripeoutofagivenone.Shewouldliketokeeponlyherfavoritecolorsinherfavoriteorderbycuttingoffthoseunwantedpiecesandsewingtheremainingpa...

Givenastring,youaresupposedtooutputthelengthofthelongestsymmetricsub-string.Forexample,given IsPAT&TAPsymmetric?,thelongestsymmetricsub-stringis s...

3Ddp问题 classSolution{public:boolisScramble(strings1,strings2){//StarttypingyourC/C++solutionbelow//DONOTwriteintmain()functionintN=s1.size();if(N!=s2.size(...

由于应用频繁地Fullgc,就dump了内存下来用MAT分析，发现有个map占用了98%的内存，于是找到这个map privateConcurrentMap<String,String>nick2numid=newConcurrentHashMap<String,String>();存...

EF插入或更新数据时出现错误提示：Anerroroccurredwhileupdatingtheentries.Seetheinnerexceptionfordetails.的解决办法。原因一：数据库字段类型为datetime已设置默认值（getdate()）.但EF插入和更新的时候是没有主动设置其值，程序自动赋值为&...

格式字符串采用以下形式：Axx，其中A为格式说明符，指定格式化类型，xx为精度说明符，控制格式化输出的有效位数或小数位数。格式说明符说明示例输出C货币2.5.ToString("C")￥2.50 D十进制数25.ToString("D5")00025E科学型25000.ToString("E")2.50000...

 functionshowCase(value){switch(value){case'A':console.log('CaseA');break;case'B':console.log('CaseB');break;caseundefined:console.log('undefined');break;d...

 在app中的build.gradle中加入如下代码，configurations{all*.excludegroup:'com.google.code.gson'all*.excludegroup:'com.squareup.okhttp3'all*.excludegroup:'com.squareup.o...

 defsolution(s):s=s.strip()if(s):l=len(s)first_n=-1b_n=-1last_n=-1f_n=-1foriinrange(l):if(s[i].isdigit()):first_n=icontinueif(nots[i].isdigit()):if(s[i]=="...

 classSolution(object):defget_f_l(self,s_length,s,list_all,last_d):max_l=0first_d=0last_d=0foriinrange(len(list_all)):if((i+1)==len(list_all)):breakforjinr...

 转为string类型str(a) ...

 classSolution(object):deflengthOfLongestSubstring(self,s):d=""f=""foriinrange(len(s)):ifs[i]notinf:f+=s[i]else:iflen(d)<len(f):d=ff=f[f.index(s[i])+1::...

 defstr_to_hex(s):return''.join([hex(ord(c)).replace('0x','')forcins])defhex_to_str(s):return''.join([chr(i)foriin[int(b,16)forbins.split('')]])defstr_to_b...

 在布局文件中，文本的设置使用如下写法时会有警告：Hardcodedstring"下一步",shoulduse@stringresource<Buttonandroid:id="@+id/button1"android:layout_width="118dp"android:layout_height=...