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Python: List vs Dict for look up table
I have about 10million values that I need to put in some type of look up table, so I was wondering which would be more efficient a list or dict ?
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Can you get the column names from a SqlDataReader?
...= cmd.ExecuteReader();
var columns = new List<string>();
for(int i=0;i<reader.FieldCount;i++)
{
columns.Add(reader.GetName(i));
}
or
var columns = Enumerable.Range(0, reader.FieldCount).Select(reader.GetName).ToList();
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获取文件系统映像及恢复删除的数据（FAT文件系统格式描述） - C/C++ - 清泛...
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偏移量
字段描述
必须 的 ？
0-2
启动文件系统载入器 (loader)的 汇编代码 (即转到 loader 的起始位置 )
不
3-10
操作系统名称 ( ASCII 形式 )
不
11-12
磁盘扇...
How to configure IntelliJ (also Android Studio) redo shortcut to CTRL+Y instead of CTRL+SHIFT+Z?
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edited Aug 12 '14 at 8:09
Nalaka526
9,5141818 gold badges7575 silver badges114114 bronze badges
answe...
How do I set the proxy to be used by the JVM
...re's the example with the Unix shell script:
JAVA_FLAGS=-Dhttp.proxyHost=10.0.0.100 -Dhttp.proxyPort=8800
java ${JAVA_FLAGS} ...
When using containers such as JBoss or WebLogic, my solution is to edit the start-up scripts supplied by the vendor.
Many developers are familiar with the Java API (ja...
How do I pass an extra parameter to the callback function in Javascript .filter() method?
...turn function(element) {
return element.indexOf(wordToCompare) === 0;
}
}
addressBook.filter(startsWith(wordToCompare));
Another option would be to use Function.prototype.bind [MDN] (only available in browser supporting ECMAScript 5, follow a link for a shim for older browsers) and "f...
UIBarButtonItem with custom image and no border
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answered Apr 21 '10 at 8:47
VladimirVladimir
165k3535 gold badges377377 silver badges309309 bronze badges
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Indexes of all occurrences of character in a string
...y's solution has had.
int index = word.indexOf(guess);
while (index >= 0) {
System.out.println(index);
index = word.indexOf(guess, index + 1);
}
It can also be done as a for loop:
for (int index = word.indexOf(guess);
index >= 0;
index = word.indexOf(guess, index + 1))
{
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What do I use for a max-heap implementation in Python?
... way is to invert the value of the keys and use heapq. For example, turn 1000.0 into -1000.0 and 5.0 into -5.0.
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URL matrix parameters vs. query parameters
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Yaman Kumar
30733 silver badges1010 bronze badges
answered Apr 9 '11 at 3:25
Tim SylvesterTim Sylvester
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